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"Sea cucumbers - Holothuroidea - are animals"

TRUE
It is true, are animals, although these creatures, which can reach two meters long and lying on the seabed like snakes, not appear to be very much alive. These are related echinoderms with sea stars and sea urchins (Echinoidea) and can even move. Observing this phenomenon requires patience. They not move more than four meters per hour. It's more exciting when are attacked, by releasing large quantity of a white sticky substance so the confusing predators are usually without escape in these "spaghetti".
Facts from Nature