Video, narrated by a state park interpreter, of a banana slug in its natural habitat.

California Academy Scientist Mart Pola Perez has made studying these gorgeous creatures of the sea her life's work. [0:32]

Academy Researcher, Marta Pola, talks about her love of colorful creatures called Nudibranchs. [3:35]

A dangerous nudibranch is to be taking over along the Marin County, California coastline. [2:48]