Tethydidae is a family of dendronotid nudibranch gastropod mollusks in the superfamily Tritonioidea. The original spelling (subfamily) is Tethydia. It was placed on the Official List by Opinion 1182 of ICZN (1981: 174), which also ruled that the name should be corrected to Tethydidae (Bouchet & Rocroi, 2005).

Tethydidae. Retrieved January, 01 2022, from en.wikipedia.org/wiki/Tethydidae.

Melibe leonina, commonly referred to as the hooded nudibranch, lion nudibranch, or lion's mane nudibranch, is a species of predatory nudibranch in the family Tethydidae.

Melibe leonina. Retrieved January, 01 2022, from en.wikipedia.org/wiki/Melibe_leonina.