Exocoetidae (5e Subrace)
From D&D Wiki
Exocoetidae elves have dark purple skin and bright yellow eyes. Their long hair vibrant shades of green. They look similar to most of their elven kin except for their dragon like wings. They like to wear simple, comfortable clothes, favoring pastel colors. They are as chaotic other elves, They are focused on acquiring knowledge. They are quick to make friends and to learn their secrets. Exocoetidae elves hide in their cities in air pocket caves under the waves.
Ability Score Increase. Your Wisdom or Intelligence score increases by 1.
Amphibious. You can breathe on land and underwater
Glide. At level 5 your wings allow you to glide equal to half your walking speed. For rounds equal your dexterity modifier minimum of 1. At level 12 your flying speed is equal to your movement walking speed.
Extra Language. You can speak, read, and write in two bonus language.