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
Fish of the Black sea – a total of 193 species. About all we will not speak. But some of the fish species of the Black sea is worth mentioning.
The mullet is a genus of fish of the family of mullets, numbering two kinds. This valuable little food fish reaches a length of 40 cm red mullet are Distinguished by the presence of long “whiskers” on the lower jaw, which muddies the sand on the sea bottom and catching small animals. Live in the Mediterranean and adjacent seas. Fishing for red mullet .
Goatfish or red mullet
Kalkan, the largest black sea flatfish, reaches a length of over 70 cm and a weight of 12-16 kg. more Dark spin Kalkan (formerly the left side) covered with numerous bony tubercles. Hard skin fish owes its name to the Turkish word “Kalkan” means a shield with additional protection, umbono. Kalkan inhabits sandy and Shelly soils of the seabed. Winter and summer it is the depth, in spring and autumn makes a small migration and moves to shallow water. It spawns from April to July. Feeds on demersal fish and crabs. The body flounders glosses covered with scales. Eyes, unlike Kalkan, moved to the right side. Length of Glossa is not more than 30 cm. Continue reading
A long time ago, even before dinosaurs roamed the Earth and were the first sharks that these extraterrestrial beings already inhabited the seas and oceans. They are the most ancient inhabitants of our planet . lived on Earth for another 500 to 700 million years ago.
This jellyfish is one of the most amazing, beautiful and mysterious sea creatures.
Jellyfish seem to be supernatural creatures, alien beings largely thanks to its strange forms and colors. The nature has created them according to his own, some incredible drawings: the body resembles an umbrella, or bell, sometimes the ball.
His name jellyfish has been because of the similarity with a wiggling hair-the legendary snakes of the Gorgon Medusa from Greek mythology. (Photo Animal Theory):
There are about 2000 different species of jellyfish. Some live in fresh water, others are found in seas and oceans. (Photo By The Tahoe Guy):
As already mentioned, jellyfish have lived on Earth for another 500 to 700 million years ago. This is a very long time. For example, the first dinosaurs appeared about 225 million years ago and the most ancient representatives of the sharks existed about 420-450 million years ago. (Photo Animal Theory):
The structure of a jellyfish is also incredibly: primerena they consist of 95% water, 3-4% — of salt and 1-2% — from protein. They have no heart, no eyes, no circulatory system or gills.
The Cassiopeia jellyfish, living mainly in the Mediterranean sea. (Photo Pietro Columba) Continue reading