Your Dexterity score increases by 2.

You have a similar lifespan to humans

Your jaw is built to trap prey, you can use an action to make a bite. If you hit with them, you deal piercing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike. Additionally, the target is grappled. Until this grapple ends, the target is restrained, and you can't bite another target.

Accustomed to twilit forests and the night sky, you have superior vision in dark and dim conditions. 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.

You can speak, read, and write Common and Aquan.

You have advantage on saving throws against being charmed. 

If you don’t submerge yourself in water in between long rests, you die. Additionally, you can breathe underwater and on land.

Eryoblins range from under 5 feet to over 6 feet tall and have stocky builds. Your size is Medium.

Your base walking speed is 25ft. Your base swim speed is equal to your walking speed.

You have proficiency in the Athletics skill.