Moofish

Mōgyo are strange enemies that appear to be a combination of a cow and a fish found in the Tree Zone in Super Mario Land 2: 6 Golden Coins. Mōgyo are found in the trunk level of the Tree Zone swimming in the tree's sap. If Mario enters the sap it is in, the Mōgyo charge at him horizontally. To defeat this creature, Mario has to jump on top of it or throw a fireball at it.

Names in Other Languages
=Trivia= This creature is also known as a "Gangan" and it dies very easily; squashing it,fireballing it or simply sneaking up on it and making a choking noise is enough to kill it. http://youtu.be/T6uwbmFi_yk?t=7m8s