Plesiotrygon iwamae is a freshwater stingray, commonly known as the Antenna Ray, they are the only member of the genus Pleisotrygon. They belong to the family Potamotrygonidae and to the class Elasmobranchii, which is what sharks belong to. They get to about 22 inches in length, this does not include the tail. Their distributionis the upper to lower Amazon River basin, from Ecuador to Belém, Brazil, in the Napo, Solimões, Amazonas and Pará rivers.

Antenna rays have smaller mouths than most other rays. Because of this, they feed on black worms, for tubifex worms. When young (under 10 inches) this species has trouble eating even the smallest night crawlers so blood worms would be better. Read the rest of this entry »