Masked Bannerfish

Masked bannerfish (public domain)

The masked bannerfish (Heniochus monoceros) has a flattened, black-and-white banded body. Its caudal, dorsal, and anal fins are yellow, and its head is marked by a black bar with white blotches or lines. The masked bannerfish reaches a maximum length of about 23 centimeters (9.1 inches) and feeds on bottom-dwelling invertebrates, preferably annelid worms.

Inhabits the Indo-Pacific Ocean.

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This supplemental online resource accompanies the book Scuba Diving Hand Signals by Lars Behnke, available on Amazon.