You can breathe air and water

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 can’t discern color in darkness, only shades of gray

Adapted to the frigid ocean depths, you have resistance to cold damage.

When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a long rest.

You were raised among a people that live near or in the sea.
Ability Score Increase. Your Dexterity score
increases by 2, and your Constitution score increases by 1.
Friend of the Sea. Using gestures and sounds, you can communicate simple ideas with any beast that has an innate swimming speed.
Weapon Training. You have proficiency with the spear, trident, light crossbow, and net.
Languages. You are fluent in one standard language and one other language of your choice.