About Marionia blainvillea (Risso, 1818)
Marionia blainvillea (Risso, 1818) is a species of sea slug. It is classified as a dendronotid nudibranch, which is a type of marine gastropod mollusc belonging to the family Tritoniidae. This species was originally described from specimens found in the Mediterranean Sea. It has also been reported in the Atlantic Ocean, ranging as far north as the Bay of Biscay. Juvenile individuals of Marionia blainvillea are white in color.