Scientists and fishermen in Brazil caught an “armored” river creature known to sting and discovered a new species, a study said. Photo from Willian Massaharu Ohara via Tencatt, Ohara, Carvalho, and ...

Their heads are “roughly triangular” with a “small” mouth and bumpy lips ... Several Hoplisoma noxium, or noxium armored catfish, from the aquarium trade. Photos from Steven Grant ...