GENERAL HISTOLOGY

Detailed explanation-1: -Brittle stars have very fragile-looking, worm-like arms and basket stars have a series of branching arms resembling a basket. Both are echinoderms that belong to the Class Ophiuroidea, which contains thousands of species. Due to this classification, these animals are sometimes referred to as ophiuroids.

Detailed explanation-2: -Brittle stars belong to the class Ophiuroidea. Unlike sea stars, which have plump arms, brittle stars have long, thin arms that are sharply demarcated from the central disk. Brittle stars move by lashing out their arms or wrapping them around objects and pulling themselves forward.

Detailed explanation-3: -Brittle stars belong to Class Ophiuroidea (Phylum Echinodermata) and have radial symmetry, with five elongate, skinny arms extending from their central disc, or body.

Detailed explanation-4: -Echinoderms: Sea Stars, Crinoids, Brittle Stars, Basket Stars, Sea Cucumbers, Sea Urchins and Sand Dollars.

Detailed explanation-5: -The Ophiuroidea or brittle stars, basket stars (euryalids with branching arms) and snake stars (euryalids with non-branching arms), are the largest group among extant echinoderms, with 2064 described species [1], found in all oceans from the intertidal to the greatest depths.