description Allocentrotus fragilis Overview
Allocentrotus fragilis is a species of sea urchin in the genus Allocentrotus. The species is associated with deep marine waters of the Pacific, including the northeastern Pacific, and is distinguished by the fragile construction of its test, the rigid shell left after the animal dies. Its delicate body is a useful feature for separating it from more robustly built sea urchins in zoological collections and marine invertebrate studies.
help Allocentrotus fragilis FAQ
What is Allocentrotus fragilis?
Allocentrotus fragilis is a species of sea urchin in the genus Allocentrotus. It is associated with deep marine waters of the Pacific, including the northeastern Pacific.
Why is Allocentrotus fragilis called fragile?
The name reflects the fragile construction of its test, the rigid shell left after the living animal is gone. A delicate test can break more easily during collection or fossil-like specimen handling.
Where is Allocentrotus fragilis found?
The species is associated with Pacific deep-water habitats, particularly the northeastern Pacific. It is a marine animal rather than a freshwater or shoreline grassland species.
What is a sea urchin test?
A test is the hard internal shell that supports a sea urchin’s body. In Allocentrotus fragilis, that structure is notable because it is relatively delicate.
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