Fierasfer
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Fi`e`ras´fer
n. | 1. | (Zool.) A genus of small, slender fishes, remarkable for their habit of living as commensals in other animals. One species inhabits the gill cavity of the pearl oyster near Panama; another lives within an East Indian holothurian. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.