noun
feather star; comatulid
General term for feather stars (order Comatulida), marine animals with feathery arms.
ウミシダは海底で羽のような腕を広げている。
Feather stars spread their feathery arms on the sea floor.
noun
Comanthus japonica
Specific species of feather star found in Japanese waters.
この水族館ではウミシダの一種、ニッポンウミシダを展示している。
This aquarium exhibits Comanthus japonica, a species of feather star.
Compound of 海 (umi, 'sea') and 羊歯 (shida, 'fern'), referring to the fern-like appearance of the animal. The exact derivation is uncertain.