the.com/seadragon

means A slender, ornately frilled marine fish related to the seahorse, whose body sprouts leaf-like appendages that let it drift through seaweed almost invisibly.

from From 'sea' plus 'dragon,' a plainly descriptive coinage — the fish's ribbon-like, leafy fins and long snouted face made English speakers reach for mythical-beast language rather than a mundane fish name. It belongs to the same family (Syngnathidae) as seahorses and pipefish, all named along the same logic of comparing odd marine bodies to familiar land creatures and legends.