Sea urchin.
Sea urchin.
Widely distributed in the oceans and seas with normal salinity at depths of up to 7 km; malosolёnyh missing in the Caspian, Black and Baltic Seas part. Widespread coral reefs and coastal waters, often selyas there in the crevices and hollows of rocks. Regular sea urchins prefer rocky surface; wrong - soft and sandy soil.
Sea urchins - ground crawling or Burrow animals. Walking with a tentacle legs and needles. According to some assumptions, with the help of "Aristotle lantern" sea urchins currently drilled holes in the rock, even granite and basalt, which are hidden at low tide and from predators. Other buried in the sand or just cover themselves with pieces of shells, seaweed and so on. D.
Practically omnivorous. The diet includes algae, sponges, bryozoans, sea squirts and a variety of carrion, as well as mollusks, small sea stars and even other sea urchins. Purple Hedgehog Sphaerechinus granularis easily copes with cancer-mantis Squilla mantis. Living on soft ground types swallow sand and silt, falling digesting them small organisms.
Some marine organisms use to protect sea urchins hiding among their needles: sea cucumbers, brittle stars, polychaetes. The parasitic gastropods (Melanellidae), penetrating into the base of the needles kopenosnyh urchins, form galls and thus prevent the growth of needles. Some species of mollusks are attached to needles its masonry, and developing shellfish urchin shells drilled, slips into his proboscis and feed on fabrics.
Sea urchins are food for the lobsters, sea stars, fish, birds, seals. The main natural enemy of the sea urchin is a sea otter. Catching hedgehog, otter or long twirling it in his paws (sometimes pre-wrapped in seaweed) to trample the needle and then eats; or breaks the urchin stumbling on his own chest. The number of sea otters eaten urchins so large that the intestine, peritoneum, and even the bones of marine mammals sometimes painted with pigments of sea urchins in the color purple.
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Buy Aquarium and accessories for it then you can ☛https: //goo.gl/PWTqCj
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Like!
Переводчик Google для бизнеса –Инструменты переводчикаПереводчик сайтовСлужба "Анализ рынков"