HAZARDOUS MARINE ANIMALS

 

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HAZARDOUS MARINE ANIMALS

A Review From Sharky's Dive


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A. SHARKS:

There are approximately 350 known species. But only Twenty or less are though to attack man . 80% Fatal If Attacked (Size 1-30 ft. )

Some Known Species:

Mackerel, Mako, Great White (Isuridae Family) Fast swimming open water sharks

Requiem Sharks: Tiger, Lemon, Bull, White Tipped, Blue, Lake Nicaragua (Carcharinidae Family) In shore and open water shark.

Sand, Gray, Nurse, Ganges, (Carcharinidae Family) Shore feeding shark.

Hammerhead (Sphyrnidae Family) In all the warm waters in the world and believed to locate their pray by keen senses of smell and hearing.

DIAGNOSIS:

Tissue removel with loss of entire area of bite in a crescent or disc-shape area, most deaths are due to hemorrhage.

TREATMENT:

Prompt tourniquet and control of shock, tetanus prophylaxis and antibiotics.

PREVENTION:

Stay out of waters which sharks have been sighted.

Dont provoke sharks, even small ones. Remove bleeding fish from water as soon as they have been speared. Leave the water quickly and quietly when sharks are sighted. Remember that sharks have been discouraged by beating the head, gills and snout.

3. SEA DISASTERS

Don't abandon your clothing as this protects against the roughskin of a shark. Place the bleeding wounded in a raft. Do not throw out garbage, blood or bait for fish if a shark is sighted. Remain quiet and use rhythmic strokes if you must remain in the water. Brightcolored garments and swimsuits, however which contrast sharply with light skin are likely to attract sharks, as do wounded fish and jettisoned garbage.

B. GREAT BARRACUDAS:(Sphyraena Barracuda)

REGION: Florida, West Indies, Brazil, Indo-Pacific region.

Baracudas will appear out of no-where, they will follow the diver for a while,then disappear as quickly as they appeared. Barracuda bites are very raer. In murky water they may mistake a shinny object on a swimmer or diver for a bait fish and non-purposely bite the diver or swimmer. There are two types of Barracuda found in Florida waters. The smaller variety, are one to two feet long, the larger one known as the Great Barracuda run five feet or more. They are both torpedo shape and sliver in color, with a dark bar running down the sides. The large one is greenish-gray in color on the top with white belly.

DIAGNOSIS:

Straight razor-like lacerations without tissue removal, most attacks occur on beaches, they are usually related to poor visibility and the victims having been mistaken for food (fish)

TREATMENT:

Tourniquet (greatest danger is blood loss); prompt suture of wounds, tendons, nerves and large arteries; Tetanus prophylazis and antibiotices.

C. GROUPERS: Size up to12 Ft. and 700 Lbs. Size and feeding habits make them dangerous. Don't antagonize they may maul a diver & they have big mouths, that are full of sharp teeth.

D. MORAY EELS: (Gymnathorax Mordax)

Sizes up to 10 Ft... REGION: In tropical seas and about reefs.

DIAGNOSIS:

Severe lacerations with spiny teeth. Generally provoked when a diver's hand enters the hole in which it lives. Danger of infection. The powerful eel can hold a diver down long enough to suffocate him.

TREATMENT: Irrigation, hemostasis, and of the wound, tetanus prophylaxis and antibiotices.

PREVENTION: BE CAREFUL WHEN PUTTING HAND INTO HOLES AND DARK CREVICES.

E. Electric rays

Are the only major group of marineanimals encounteres by divers that are capable of producing an electric current. These animals are found in both the Atlantic and Pacific oceans.Have the general body shap of a stingray, they differ by having thicker wings and tails with fins that are modified for swimming. Many are capable of producing a powerful jolt. Divers must be cautious around electric rays and avoid poking or handling them.

E. Electric Fish Eels (Electrophorus)

REGION: Freshwater inhabitants of the tropics

DIAGNOSIS:

The shock may temporarily disable the swimmer: It is believed to range about 350 volts.

TREATMENT:

No treatment is necessary other then possible aid in reaching shore.

F. KILLER WHALES: (Orcinus Orca)

REGION: In all seas.

(WARNING: Never frequent any area in which they have been reported. They have accounted for several deaths off the Califorina coast.)

DIAGNOSIS:

Ferocious and large (30 ft.) Killer whales attach in packs and have been known to slaughter entire herds of seals.

TREATMENT:

Symptomatic and supportive

PREVENTION:

Diver's should get out of water immediately.

G. SEA TURTLES:

Sea turtles are found in all the oceans of the world. They are large slow moving animals. Divers may try to hang on to them for a ride, often without conequence, but if provoked or harmed, these turtles have been known to cause serious bites on divers.

H. Barnacles:

Shellfish that grow on rocks, piling or wrecks. They are sharp and can cause deep cuts if rubbed against.

I. Annelid Worms

( The third main class of invertebrate stingers)

Bristleworms are bottom dwellers they have tufts of sharp bristleson the sides of their segmented bodies. When you touch the bristles they penetrate the skin. The bristles are very difficult to remove.

  • A. Glycera biting jaws (resembles centipede)
  • B. Eurythoe, Hermodice, stinging hairs

REGION:

  • A. North Carolina to Canadian Coast ,
  • B. Gulf to Mexico and picific.

    DIAGNOSIS:

    A. Glycera produce an oval bite which becomes rythematous, inflamed and later numb and itching.

    B. Bristle worm stings produce swelling, inflammation, and numbness.

    TREATMENT:

    Bites should be thoroughly cleansed, bristles are best removed by adhesive tape. Clean area with alcohol, then apply a cortisone base cream to alleviate the burning sensation.

    J. CORAL:

    Sharp, gives cuts and abrasions, slow to heal. All coral abrasions contain pieces of calcareous material and animal protein. If untreated, a mere scratch can turn into a painfully festering ulcer that will recur periodically for years.

    SYMPTOMS:

    The initial reaction to the coral cut, sometimes called coral poisoning, it has the appearance of red welts and itching or burning around the wound.

    TREATMENT:

    Prompt application of antiseptic angents, such as 2% tincture of iodine, or perferably Zephiran, will go a long way toword perventing later difficulty. Another but unconventional approch has been found quite effective; cleanse the wound with a brush or coarse cloth, water, and pHiso-Hex or soap. Then dry the wound and clean it with alcohol, dry again and rinse with hydrogen peroxide. These measures should remove foreign material and bacteria. While the wound is still wet, empty the contents of a tetracycline capsule onto the area, and pat it into a paste with a tongue blade. Allow this to dry and use no further covering.The paste will form a false eschar that will retard the growth of organisms underneath. This protecive burrier will slough as the wound heals from the edges. In severe cases, the patient may have to be put on complete bedrest with the affected limb elevated. Kaolin poultices should be used, dressings should be saturated with magnesium sulfate in glycerin solution, and antibiotics should be administered. Antihistammines, given orally or applied locally, will help relieve the pain.

    ANIMALS THAT INJECT VENOM

    A. CNIDARIA:

    Of the 9000 or so species of the phylum, approximately seventy have been implicated in injuries to man. Among those that have inflicted injuries on humans.

    ARE THE FOLLOWING;

    1. HYDROZOA:

    (Or hydroids and Hydromedusae). Medusae Hydroids

    2. Millepora corals

    The fire, or stinging, corals produce small reddened, somewhat papular eruptions, which appear 1 to 10 hours following the contact, and usually subside within 24 to 96hr.

    3. Siphonophores

    4. ANTHOZOA: (Or sea anemones, sea feathers and corals).

    • A. Actiniaria (Anemones)
    • B. Madreporaria (Corals)
    • C. SCTPHOZOA:(Or true jellyfishes).
    • D. Cubomedusae (Sea Wasps) Corontae Semaeostomae, Rhizostomeae

    1. PORTUGUESE MAN OF WAR (Physalia Palagica) 6 inches and up in diameter tentacles up to 50 Ft.

    REGION: Atlantic coast and Indo- Pacific region It floats at the surface trailing stining tentacles. The tentacles dangling beneath thesurface are coverd with thousands of stinging cells capable of emitting microscopic organelles, the nematocytes, each of which consists of a small sphere containing a coiled hollow thread. When activated by touch the thread is uncoiled with such force that it can penetrate skin and even rubber gloves. On contact venom in the cyst is injected into the victim through the thread. The toxic reaction depends upon the number of strings and the degree of the victim's sensitivity. In most cases the sting is extremely painful, somewhat akin to the sting of hornets. Severe pain is often associated with sings of clinical shock. Cardiac arrhythmias occur and can be demonstrated by EKG.

    SYMPTOMS:

    The lesions produced following contact with the Portuguese nam-of-war (Phtsalia appear as small papular eruptions in one or several discontinuous lines which may sometimes encircle the extremity or injured part. Weakness, nauses, headache, pain and spasms in the large muscle masses of the abdomen and back, lacrimation and in many cases. Difficulty and pain on respiration, changes in pulse rate.

    SEVERE CASES: In more severe cases there is immediate, intense, burning pain. In addition,pain and difficulty in respiration and nasal and bronchial secretions are sometimes reported. Vertigo, mental confusion, increased pulse rate and dilatation of the pupils may be reported.

    TREATMENT:

    The application of alcohol to the injured area. IF none , Dry sand or flour should be sprinkled on the lesions and after 30 sec scraped off with a knife.

    NEVER RUB with wet sand or fresh water. Application of a topical analgesic-cortisone lotion is advised. For severe pain the use of codeine or meperidine may be indicated. Cnidaria, Chironex Fleckeri and Chiropsalmus Guadrigatus. Are followed sometimes later by backache, weakness, headache, painful spasms in the abdomen, thighs and chest, some dyspnea, increased perspiration, dryness of the mouth and vomiting. The illness is non- fatal and responds well to intravenous pethidine.

    2. Scyphozoa, or Jellyfish Family Include the most dangerous the SEA WASP:...Soft tentacles. The sea nettle and sea blubber. Anthozoa are the elk horn coral and members of the sea anemone group.The coelenterates sting by releasing venom from cells or tentacles.. contact with them sets off trigger like mechanisms which inject a tiny thread tube from a venom filled cell. Many thousands of the microscopic cells are found on tentacles. Results of contact vary from mild to sever, local to general and sometimes are fatal.

    SYMPTOMS:

    Range from prickly sensation to shooting pain, which render victim unconscious. Also red,puffy skin, blisters, swelling. In severe cases there may be muscular cramps, loss of the sense of touch, temperature,nausea, vomiting, sever headaches, loss of speech, frothing at the mouth, respiration difficulty, paralysis, delirium, convulsions and death.

    TREATMENT:

    • 1. Get Out Of Water.
    • 2. Get Medical Assistance.

    First Aid.

    A) Remove tentacles and as much of stinging fluid as possible. Apply weak ammonia, Baking soda. Rub gently with wet sand, and wash with FRESH water.

    B) Attempt to reduce local reaction by using ointment or antihistamine cream, otherwise us a olive oil, sugar, soothing lotions. Apply cold compresses.

    C) "Halstead" suggests morphine to relieve pain, calcium gluconate for muscle spasm, and for severe systemic reactions, cardiac and respiratory stimulanrs, artificial respiration and other supportive measures as needed.

    PREVENTION:

    • A) Avoid contact
    • B) Wear rubber suit
    • C) Watch out for detached tentacles, they can still sting. SEA WASP:

    In the South Pacific one sub species of the Sea Wasp has been known to cause death

    IF STUNG: Seek medical attention immediately, Follow same procedure as the man-of-war sting.

    C. ECHINODERMATA

    6000 Species of echinoderms at least eighty knowen to be venomous or poisonous. Ingestion of the ova of certain urchins gives rise to poisoning, sea cucumbers produce a substance that is toxic to fish and other marine animals and perhaps to nam.

    1. ASTEROIDEA:

    starfish with thorny spines of calcium carbonate.

    2. ECHINOIDEA:

    Regular sea urchins with "Poisonous spines".

    SEA URCHINS:

    (The black long-spine urchin, Diadema Setosum is the most venomous variety; The red sea urchins such as Toxpneustes Elegans and Asthenosoma Jimoni produce milder symptoms.)

    REGION:

    In warm waters, Abundant on ocean floor and cling to rocks and coral, wrecks ect. Injury from spine is most common. Venumus urchins can be very dangerous.

    DIAGNOSIS:

    The spines penetrate soft tissues and produce redness, swelling, and intense burning the venomous spine or pedicellariae have poisonous tips and 3 pronged biting teeth which cling long after detachment.

    SYMPTOMS:

    Traumatic injuries of the skin by spines of sea urchins without envenomation are well known. They may break off in a puncher wound causingconsiderable local reaction, often givs rise to infection. Some spines are absorbed within 16 to 48hr, where as other may need to be removed surgically. Both the venomous and nonvenomous spines can give rise to granulomatous nodular lesions. Injuries by pedicellariae, immediate intense pain, localized swelling and redness about the wound, an aching sensation in the involved part, nausea and syncopy.

    IN SEVERE CASES:

    Difficulties in respiration, parasthesia about the mouth with some atonia of the muscles of the lips, tongue, larynx and eyelids and sometimes the muscles of the limbs. Complete atonia and ataxia may occur.

    TREATMENT:

    Remove spines immediately with forceps, pedicellariae must be searched out and also promptly removed; brittle tips may break off and if not absorbed within 48 hours must be surgically excised; purple discoloration at the point of injury is a pigment of the spine and is not dangerous although often worrisome to the patient; Shoes and gloves offer little protection from the spines; the diver or swimmer should avoid contact with these urchins.

    PREVENTION: BE CAREFUL WHERE STEPPING AND WEAR HEAVY RUBBER HEEL ON FINS.

    D. HOLOTHUROIDEA: Sea Cucumbers

    SYMPTOMS:

    Posionings by Holothuroidea are rare, Acute gastric distress with nausea and vomiting with ingestion of certain toxic sea cucumbers. Pruritus with mild swelling and redness of the hands has been reported following the handling of some holothurians. Acute conjuctivitis has been observed in persons who have swam in waters polluted with the tissue extracts of toxic sea cucumbers.

    E. CONE SHELLS:

    400 Species found in Fl.& Indo Pacific. These shells contain a slug like anamial which has microscopic venom filled teeth. The cone shells are prized by collectors and several human deaths have been noted from stings to the hand the gastropod uses its sting to kill other gastropod and secretes a toxin which competes for acetylcholine at the motor end plate.

    SYMPTOMS:

    • A) Local ischemia (Shutting down of the blood supply.)
    • B) Depressed Respiration
    • C) Cyanosis (Blueness)
    • D) Sharp stinging or burning sensation.
    • E) Spreading numbness.
    • F) Paralysis.
    • G) Coma
    • H) Finally Death

    TREATMENT: C.P.R. If Required Pressure-Immobilization Keep the patient still, quite and reassured Monitor the airway, breathing, irculation indentify the cone, seek medical aid.

    PERVENTION:

    Avoid handling soft part of animal, Handle by large end of shell only.

    MOLLUSCA:

    There are approximately 80,000 spices of molluscs, of which about eighty-five have been implicated in poisoning to man or are known to be toxic under certain conditions.

    They are Gastropoda, Pelecypoda and Cephalopoda.

    1. Gastropoda: (cones) Most of the venomous spices of molluscs are found in the classes Gastropoda and Cephalopoda. The most dangerous gastropoda are mambers of the Conus.

    SYMPTOMS:

    The sting gives rise to immediate, sometimes intense, localized pain at the site of the injury. Within 5 min. the victim usually notes some numbness and ischemia about the wound. A tingling or numbing sensation may develop about the mouth, lips and tongue, and over the peripheral parts of the extremities. Other symptoms and stings may develop during the first 30 min following the injury. These include: dizziness, increased lacrimation and salivation, weakness, and pain in the chest which increases with deep inspiration. The numbness about the wound may spread to invlove a good part of the extremity or injured portion. In the more severe cases, respiratory distress with chest pain, difficulties in swallowing and phonation,marked dizziness, blurring of vision and an inability to focus.

    2. Cephalopoda (OCTOPUS)

    Up to 25 Ft. in span moreinquisitive then vicious. Only danger is that octopus may trap diver underwater if he has a good grip on diver. Clothing or wet suit will hinder suction cups. Keep away from caves ,crevices, and wrecks- if possible.

    Bites from the beak-like mouth of the octopus results in two small puncture wounds; they appear to bleed more freely than one would expect. Infiltration in the area of a poison from the salivary glands which is used to paralyze the small crustacea on which it feeds, have caused at least one known human death. The Blue Ring Octopus is a unique type of octopod, it is usually four to six inches long. They are found in Australian waters. The Blue ring bite is often fatal.

    PREVENTION:

    Do not handle or provoke them.

    SYMPTOMS:

    Burning,Tingling or numbness about the wound site are not uncommon complaints. Swelling is usually minimal immediately but may develop 6-12h later. Localized pruritus, Free bleeding from the wound. Light-headedness, And the wounds heal slowly.

    TREATMENT:

    Generalized supportive care, treat the bite same as for fish sting. You can kill an octopus by stabbing between the eyes.

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