anglerfish
鱇 centers on the anglerfish, a deep-sea fish known for its bioluminescent lure.
鱇 is a phono-semantic compound: 魚 (fish) provides the meaning, and 康 likely contributes the sound コウ. The character was created specifically for the anglerfish.
The left side 魚 means fish, and the right side 康 suggests health or ease. Imagine a deep-sea anglerfish, perfectly adapted and at ease in the dark ocean, luring prey with its glowing light.
For コウ, picture an anglerfish swimming in a calm cove: cove -> コウ, and the fish glides through the water.
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goosefish (any fish of family Lophiidae); monkfish; sea devil
potbellied sumo wrestler; wrestler with a big belly
football fish (any fish of family Himantolophidae, esp. the Atlantic footballfish, Himantolophus groenlandicus)
triplewart seadevil (Cryptopsaras couesii)
frogfish (any fish of family Antennariidae, esp. the striated frogfish, Antennarius striatus)
toadfish (any fish of family Batrachoididae, esp. the Pacuma toadfish, Batrachoides surinamensis)
grey sharpnose shark (Rhizoprionodon oligolinx)