Definition of "myctophid"
Any of the small deep-sea fish of the large family Myctophidae, known for their conspicuous use of bioluminescence.
Quotations
The astronesthes, or 'eater of the stars,' so called because it feeds entirely upon other 'star-lit' fish called myctophids, is not only endowed with a number of small, luminous organs upon its body, but its fins, and the greater part of its chin-barbels, also emit a bright light.
1933, Walter Sydney Berridge, All about Fish and Other Denizens of the Seas & Rivers, page 67