
Richard Herrmann / seapics.com
Species: Neoclinus blanchardi
Habitat: seafloors 3 to 73 metres down along the coasts of California and Baja California
Sarcastic fringeheads have a stronger temper than your average fish, but it isn’t a sharp tongue that you have to look out for: it’s their gaping, fluorescent mouth.

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When threatened by other males, these fish can open their mouths about as large as their entire head, displaying an outer and inner row of teeth. It’s all an effort to show other fringeheads that “I’m bigger than you and you shouldn’t come …