description Brisaster fragilis Overview
Brisaster fragilis is a living irregular sea urchin in the family Schizasteridae, the group that includes heart urchins adapted to life on or within marine sediment. It was described by Düben and Koren in 1844 and is associated with the northern Atlantic, where it belongs to the deep-water fauna represented by the genus Brisaster. Its bilateral, heart-urchin body plan differs from the round, strongly radial form of familiar regular sea urchins.
help Brisaster fragilis FAQ
What kind of animal is Brisaster fragilis?
Brisaster fragilis is a living irregular sea urchin in the family Schizasteridae. It belongs to the group commonly called heart urchins, which are adapted to life on or in marine sediment.
Where does Brisaster fragilis live?
It is associated with the northern Atlantic. Unlike a typical rock-dwelling regular sea urchin, it is adapted to soft marine sediment.
Who described Brisaster fragilis?
The species was described by Düben and Koren in 1844. Its scientific name places it within the irregular sea urchins rather than the more rounded regular forms.
Why is Brisaster fragilis called an irregular sea urchin?
Irregular sea urchins have body shapes and symmetry adapted to moving through or living on sediment. Brisaster fragilis belongs to the heart-urchin group, whose members are not shaped like the classic round sea urchins found on rocks.
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