characteristics of brittle star?
Answers
Explanation:
The common brittle has a hairy appearance, due to all the fine spines, seven on each arm segment. There are also spines on the central disk. It comes in a wide range of colors like green, brown, orange, yellow or red. The disk may reach a diameter of 2 cm and the five arms a length of 10 cm.
Characteristics of brittle stars
Brittle stars are close relatives of sea stars. Characterized by radial symmetry with a central body from which five snakelike arms protrude. The arms are highly flexible. There is no replication of internal organs, just one set in the central disk. Compared to starfish, brittle stars have a much smaller central disc and no anus. Wastes are eliminated through the mouth which is situated on the underside center.
On the underside of the body disk there is a splitlike opening at the base of each side of each arm. These ten openings are breathing and reproductive outlets, taking in water for oxygen and shedding eggs or sperm into the sea.
The basket stars are a specialized type of brittle stars. They have a series of complexly branched arms which are used to catch plankton.
Serpent stars are seen coiled snakelike around branches of gorgonians
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