The mysterious Mareladrin are a race of elves that live beneath the oceans and seas of the world. Even many elves have never seen a sea elf. They can travel on land for a number of days equal to twice their Con score, and can survive in fresh water as well as salt. They are rumored to be powerful warriors and wizards. They have greenish silver to pale blue skin, with emerald green to blue hair, and eyes of blue or green. They gain a +1 to hit with spears and short or long swords and have double the base age and age variable.
(Note) uses statistics from D&D Beyond for Triton. Change age, and trance to suit "sea-elves" lore. Innate spells work underwater.