noun
lobster moth
A moth species (Stauropus fagi persimilis) whose caterpillar resembles a lobster or a shachihoko ornament. The name is usually written in katakana.
シャチホコガの幼虫は、まるで小さなエビのような姿をしている。
The larva of the lobster moth looks just like a tiny shrimp.
The name シャチホコガ comes from the caterpillar's resemblance to a shachihoko (鯱), a mythical carp-like roof ornament. The exact derivation is uncertain, but the shape is the likely source.