Sea Elf

Races that are not Large nor have an innate flying speed gain an extra Feat of their choice. This Feat must be a "Full Feat".

Your character can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character. 

You gain proficiency in one skill of your choice.

You gain 3 ability points to increase any abilities of your choice. You can't increase a single ability by more than 2 with these points.

You can breathe air and water, and you have resistance to cold damage.

You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray. 

You have advantage on saving throws you make to avoid or end the charmed condition on yourself. 

Aquatic animals have an extraordinary affinity with your people. You can communicate simple ideas to any Beast that has a swimming speed. It can understand your words, though you have no special ability to understand it in return. 

You don’t need to sleep, and magic can’t put you to sleep. You can finish a long rest in 4 hours if you spend those hours in a trancelike meditation, during which you retain consciousness.

Whenever you finish this trance, you can gain two proficiencies that you don’t have, each one with a weapon or a tool of your choice. You mystically acquire these proficiencies by drawing them from shared elven memory, and you retain them until you finish your next long rest.