Sketch of a pipefish:

First, figure out what a pipefish is. The following excerpts from 360 Wikipedia:

Anglerfish (ānkāng), commonly known as the stuttering (jiébā) fish, toadfish, sea toad, pipefish, etc., generally living in tropical and subtropical deep-sea waters. It belongs to the bony fish, monkfish order (Lophiiformes), monkfish family, is a worldwide fish, the Atlantic Ocean, the Pacific Ocean and the Indian Ocean are distributed.

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