Lampfish

Part of speech: noun

Definitions

1. A small deep-sea fish that has luminous organs along its body that produce light, often used for camouflage or attracting prey
2. Any of several bioluminescent fishes living in the dark depths of the ocean, equipped with glowing patches on their sides
3. A marine fish of the deep sea whose body bears light-emitting organs that help it hide from predators or lure food

Etymology: Lampfish is a plain English compound: "lamp" plus "fish," describing a deep-sea fish whose body carries light-producing organs. The name is a descriptive coinage rather than an inherited or borrowed term, and the "lamp" element is the same word that came into English from Old French "lampe," itself from Latin "lampas" and Greek "lampas," meaning torch or light. The name works because of the fish's bioluminescence. Many lampfishes, members of the family Myctophidae, have rows of photophores along their flanks and bellies, and these glowing organs help them match the faint light falling from above, a form of camouflage known as counterillumination. Naming the fish after a lamp captured this visible glow in the most direct way available to English speakers.