Fun Facts About Sea Stars BKA Start Fish. 1. Sea stars are not fish: They do not have gills, scales, or fins like fish do and they move quite differently from fish. 2.Sea stars are Echinoderms:That means they are related to sand dollars (yes, they are a real animal), sea urchins, and sea cucumbers. 3.Not all sea stars have 5 arms:While the five-armed varieties of sea star are the most well known, not all sea stars have 5 arms. 4.Sea stars can regenerate a lost arm:This is useful if the sea star is threatened by a predator - it can drop an arm, get away and grow a new arm. 5.Sea stars are protected by armor:Sea stars have a tough covering on their upper side, which is made up of plates of calcium carbonate with tiny spines on their surface. 6.Sea stars do not have blood:Instead of blood, sea stars have a water vascular system, in which the sea star pumps sea water through its sieve plate. 7.Sea stars move using their tube feet:Sea stars move using hundreds of tube feet, which are located on their underside which also allow them to stick to things.
Posted on: Mon, 15 Dec 2014 19:05:49 +0000
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