Richardson's snaggletooth (Astronesthes richardsoni) is a species of small, deep sea fish in the family Stomiidae. It occurs in the tropical western Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico. First described by the Cuban zoologist Felipe Poey in 1852, it was named Chauliodus richardsoni in honour of the Scottish explorer and naturalist John Richardson. It was later transferred to the genus Astronesthes.