12. What is the jellyfish, common in the Black and Azov seas, burning like nettles? ( Kornerot, or Hrizostom .)
13. What Medusa has much more victims than any shark? ( Sea wasp – Hironex from the squad Fleckeri Jellyfish. Occurs in the Great Barrier reef of Australia. Bell diameter up to 4,5 cm Usually “stung” her people are killed in a few minutes. The sea wasp venom affects the nervous system, leads to paralysis of the heart.
15. In some cases, predatory polychaetes dangerous to humans? ( Chitinous hook, with a serrated inner edge of the jaws of carnivorous polychaetes associated with venomous glands. Polychaetes may also have parapodia with poisonous bristles. Suffer from them most often fishermen, brought out the trawl catch. At a strong poisoning there is a sharp pain and swelling in the arms, appear headache, nausea.
16. In any case, some edible bivalves can be poisonous? ( If their tissues are developing certain bacteria or accumulate toxic substances.
17. What mollusk is called the “blue death”? ( Small (20 cm, 100 g) Hapalochaena octopus maculosa, which lives in the coastal areas of the tropical zone of the Pacific and Indian oceans. In the excited state it is covered with bright blue spots. Salivary glands of octopus have venom neurotoxins acting simultaneously on the nervous and muscular system. The bite of this clam privided paralysis of the respiratory muscles . Continue reading
The inhabitant of the sea, the fish, the lionfish, immediately attracts attention because of the bright color. Despite the name, she can’t fly. It is nicknamed the fish because of the large pectoral fins, a bit like wings. Other names lionfish — Zebra fish or lion fish. First she got because of the wide grey, brown and red stripes that are located throughout the body, and the other required long fins that make her look like a predatory lion.
Is fish lionfish the family scorpaenidae. The body length reaches 30 cm and a weight of 1 kg. Colour is bright, which makes the lionfish visible even at great depths. The main decoration lionfish — long ribbon dorsal and pectoral fins, which resemble the lion’s mane. These luxurious fins lurk sharp poisonous needles that make the lionfish one of the most dangerous inmates of the seas.
Common lionfish in the tropical parts of the Indian and Pacific oceans off the coast of China, Japan and Australia. It lives mainly on coral reefs.
During the day lionfish usually sedentary. They hide in caves among rocks and corals, clinging tightly belly to the surface and exposing their prickly and poisonous fins. At dusk they go hunting. The main source of food are crabs, shrimp, mollusks and small fish.
Standing motionless, the ribbon like beam of colored algae. Fish, who decided to examine this beam, unexpectedly fall into the widely opened mouth of the lionfish.
The visible coloration of a lionfish is not endowed with reason. Thus, it warns: “don’t come near — poisonous fish”. Grooves in the spiny rays of the first dorsal fin placed the lionfish venom glands. Very often, novice divers interested in beautiful fish, I decide to touch it or hold it in your hands. There’s a man and gets a terrible shot with a considerable dose of poison. Continue reading
The inhabitants of the deep sea are extremely dangerous. When meeting with some of them the question “do I Eat this fish?” is no longer relevant and replaced by another question: “How to get away from this fish?!”. Not surprisingly, many tourists at his ignorance about the danger, suffer from the attack of the inhabitants of the deep sea.
And this happens often at beaches, where everything is beautified and modern. What to say about extreme tourism, where there is no convenient beaches, no cubicles, not explored the bottom… the Difficulty for the extreme is not terrible – which is understandable, but the measures of own security you must always remember.
Some sharks are deadly. Beware of all the sharks and try not to attract their attention. Sharks are found in all seas and oceans, they are able to smell movement, blood and breakdown products, for example, vomiting, a very large distance.
Try to get rid of sea-sickness as soon as possible and avoid getting vomit into the water. If someone vomited, an emetic carefully gather and throw away as far as possible from boat or raft, it took him as far as possible. Continue reading