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From The Aquarium Wiki

Heteropneustidae, or the Airsac Catfish, is a very small family of catfish belonging to the order Siluriformes. There are a mere 4 known species in this family and their pectoral fin is associated with a poison gland dangerous to humans. They all have a long air sac that serves as a lung which extends backwards from the gill chamber.

	Common name	Difficulty	Maximum Size	Minimum Tank Size
Heteropneustes fossilis	Liver Catfish Stinging Catfish Fossil Catfish	Challenging	2020 in50.8 cm	7575 gal283.906 liters 283,905.884 mL