Canthigaster tyleri, also known as Tyler's toby, is a species of marine fish in the family Tetraodontidae.

The background coloration is whitish, the sides are covered with red spots, the back is yellow to green with a network of blue lines from the caudal fin to the tip of the snout.

[4] Canthigaster tyleri has a limited distribution in the Indian Ocean, it occurs in all the islands from western Indonesia to Tanzania.

Their body would have the capacity to generate from its food a powerful toxin, the tetrodotoxin, and to store it in the skin and certain internal organs like liver and gonads.

The tetrodotoxin is a powerful neurotoxic substance which symptoms are serious and can lead, in the worst case, to the death by respiratory paralysis.