Canthigaster rivulata commonly known as the brown-lined puffer, or kitamakura (Japanese: キタマクラ) is a marine fish belonging to the family Tetradontidae.

Canthigaster rivulata is a fish which grows up to 15–20 cm length.

[5] Canthigaster rivulata is omnivorous and preys mainly on algae, echinoderms and molluscs.

[7] The fish has the poison, tetrodotoxin, resided in the intestine, liver but mostly in the skin and the mucus generated by it, however it is not present in the muscle or the ovary like most other Pufferfish.

Its mucus has high risk of contamination of the toxin to other fish or human due to direct contact with the skin.