The ocean is home to numerous species that naturally transition between genders, a phenomenon known as sequential hermaphroditism:

: Originally born as a woman named Caenis , she was granted a wish by Poseidon, the god of the sea, to be transformed into an invulnerable man.

Throughout history, water has served as a setting for gender transformation and divine beings who embody both masculine and feminine traits:

Modern creators and activists use aquatic themes to explore and affirm trans identities:

: In Greek and Roman myth, the son of Hermes and Aphrodite was merged with the water nymph Salmacis while bathing in a pool. This union created a singular being with a feminized body and male genitalia, symbolizing a sacred union of sexes.