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From The Aquarium Wiki

Malapteruridae, or Electric Catfish, belongs to the order Siluriformes. This family includes two genera, Malapterurus and Paradoxoglanis, with 19 species. Malapteruridae is the only group of catfish with a well-developed electrogenic organ.

	Common name	Difficulty	Maximum Size	Minimum Tank Size
Malapterurus electricus	Electric Catfish	Moderate	48.03149606299248.031 in122 cm	160160 gal605.666 liters 605,665.885 mL