race features:
Claws: Your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.
Hold Breath: You can hold your breath for up to 1 hour at a time. Tortles aren't natural swimmers, but they can remain underwater for some time before needing to come up for air.
Natural Armor: Due to your shell and the shape of your body, you are ill-suited to wearing armour. Your shell provides ample protection, however; it gives you a base AC of 17 (your Dexterity modifier doesn't affect this number). You may not gain any benefit from wearing armour, but if you are using a shield, you can apply the shield's bonus as normal.
Shell Defense: You can withdraw into your shell as an action. Until you emerge, you gain a +4 bonus to AC, and you have advantage on Strength and Constitution saving throws. While in your shell, you are prone, your speed is 0 and can't increase, you have disadvantage on Dexterity saving throws, you can't take reactions, and the only action you can take is a bonus action to emerge from your shell.
Survival Instinct: You gain proficiency in the Survival skill. Tortles have finely honed survival instincts.
Turtle Snapper: Your mouth cuts through leaf and flesh like butter. Whenever you hit a creature with a melee attack on your turn, as a bonus action you can make a melee attack against the same enemy. If you hit with them, you deal piercing damage equal to 1d4 + your Strength modifier.