Knifefish | electric, nocturnal & freshwater | Britannica
https://www.britannica.com/animal/knifefish
webAnimal Factoids. Electric rays range in length from under 30 cm (1 foot) to about 2 m (6 feet). They are soft and smooth-skinned, with a circular or nearly circular body disk formed by the head and pectoral fins. The electric organs, composed of modified muscle tissue, are in the disk, one on each side of the head.
DA: 55 PA: 54 MOZ Rank: 13