Triton

ability score increase: One score of your choice increases by 2, and a different score increases by 1.

age: Reach age of maturity after 20 years, and have an average lifespan of 70 years.

alignment: usually lawful

Size: Medium

speed: Walking speed, 25 feet, Swimming speed of 35ft.

Languages: Lishon

race features:

You have darkvision to a range of 80ft
You gain the ability to blend into your surroundings when underwater or on the coast. As a bonus action you can hide in plain sight if you are on a seafloor or on the coast.
You can pick one of the following abilities to represent your fish resemblance:
You gain a natural bite attack that deals 1d6 and can be used as a bonus action once per short rest
You can emit a pulse of sound that deals 1d6 damage to one creature of your choice within 30 feet, if you are underwater that sound deals 2d6 and affects each creature within 30 ft. This feature can be used once per long rest
You can accelerate out of the water at breakneck speeds, you can jump out of a body of water up to 30 feet into the air as a bonus action. When you use this feature you can make one melee attack against a target of your choice.