The blackbelly triggerfish (Rhinecanthus verrucosus) is a ray-finned fish in the family Balistidae found in the Indo-Pacific.

The blackbelly triggerfish has a laterally compressed, deep body and a long snout.

The mouth is at the tip of the snout and the eye is set high on a long, straight forehead.

There is a dark brown streak below the eye and a very large black spot on the underside just anterior to the anal fin.

[3][4] The blackbelly triggerfish is native to shallow areas of the Indo-Pacific where it ranges from the Seychelles and Chagos Islands to Japan, Vanuatu, and Australia.