x-ray fish


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x-ray fish

n.
A small freshwater fish (Pristella maxillarus) native to South America and often kept in home aquariums, having an almost transparent body with a black stripe on the dorsal fin. Also called x-ray tetra.

[So called because its spine and sac of internal organs are visible, giving the impression of an x-ray photograph .]
References in periodicals archive ?
This strict adherence to form -- three designs per letter, always -- gets a little silly at times, leading to the inclusion of surprising images like a stitched x-ray fish, underpants, and a zipper -- the call for which is likely to be pretty rare.
Damast uses a newt for N, vulture for V, X-ray fish for X, and a yak for Y.
Children will love spotting the others along the way, including X-ray fish etched on glass, a shrimp set in polished slate and a turbot carved in granite.