Blunt-Spined Brittle Star

Ophiocoma echinata

Ophiocoma echinata is a large brittle star characterized by its slender, tapering arms that can reach an armspan of up to 25 cm. The arms are densely covered with short spines and are distinctly separate from the central disc. The coloration is typically dark with pale or cream markings, and it is important to note that the arms lack any red markings, which can help distinguish it from similar species. This species is found in the tropical west Atlantic Ocean, particularly throughout the Caribbean Sea and the Gulf of Mexico. Ophiocoma echinata thrives in various habitats, including seagrass meadows, reefs, and reef flats, often hiding under rocks, in crevices, or within coral heads and sponges. It is commonly encountered at depths down to about 30 metres. Feeding involves using its arms to filter food particles from the water, which are captured by the spines and transported to the mouth located in the central disc. Reproduction occurs over a prolonged season, with gametes released directly into the sea. This species exhibits an ability to regenerate lost arms, which can be beneficial for survival, allowing individuals to continue breeding even after sustaining injuries from predators. Ophiocoma echinata has been recorded at multiple dive sites, indicating its widespread presence in suitable environments. The conservation status of this species has not been evaluated by the IUCN, leaving its population status uncertain.