Guppy vs. Molly — What's the Difference?

The guppy (Poecilia reticulata), also known as millionfish and rainbow fish, is one of the world's most widely distributed tropical fish and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing.

Any of several tropical and subtropical live-bearing fishes of the genus Poecilia of the Americas, often kept in home aquariums.

A small live-bearing freshwater fish (Poecilia reticulata), native to northern South America and adjacent islands of the West Indies, bred in many colorful varieties and popular in home aquariums.

A powdered form of MDMA.

A tiny freshwater fish, Poecilia reticulata, popular in home aquariums, that usually has a plain body and black or dark blue tail for the females and a more colorful tail for the males.

A woman or girl, especially of low status.

(by extension) Any tiny fish.

(slang) An effeminate male, a male homosexual.

(paintball) A tube holding paintballs before they are loaded into the gun.

Pure MDMA powder.

(climbing) A hold across the palm of the hand rather than the fingertips.

A mollemoke.

A small freshwater fish of South America and West Indies (Lebistes reticulatus or Poecilia reticulata, originaly called Gerardinus guppyi), often kept in aquariums; also called rainbow fish.

A female cat, a she-cat usually spayed

Small freshwater fish of South America and the West Indies; often kept in aquariums

A bird, the wagtail.

A molly bolt.

A fish of the genus Poecilia, except for those known as guppies.

To engage in (male) homosexual activity with.

Same as Mollemoke.

A pet or colloquial name for Mary.

Popular aquarium fish