You have the ability to use your Bite instead of a normal Unarmed Strike. If you use your Bite, you deal 1d8 plus your Strength modifier Piercing damage instead of the normal damage. If you use a normal Unarmed Strike, it deals 1d6 Slashing damage instead of the normal Bludgeoning damage due to your sharpened claws.

You can throw yourself into a feeding frenzy as a Bonus Action. When you do, make a Bite attack against one creature within ten feet of you. This expends 5 feet of movement per creature you attack (see higher levels section). You regain an amount of HP equal to the damage dealt. The amount of creatures you can attack upgrades at levels 3 (2 creatures), 5 (3 creatures), 7 (4 creatures), and 9 (5 creatures).

You can use your Feeding Frenzy a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.

You have Resistance to Poison damage. You also have Advantage on saving throws meant to avoid or end the Poisoned condition, have a swimming speed equal to your walking speed, can hold your breath for up to 15 minutes, and are unaffected by Difficult Terrain caused by liquids or other effects related to water.

You have Darkvision with a range of 60 feet.

Your scales are hardened from long submersion in swampy waters, a common practice among dark lizardfolk. Your AC while you are not wearing armor is 10 + your proficiency bonus + your Constitution modifier.