race features:
Swallow: After a Bite attack, you may use a Bonus Action to swallow a creature at least one size smaller then you. The swallowed creature is Restrained and Blinded, it has total cover against Attacks and other effects outside you. As a Bonus action on your turn you can deal 1d10 + Constitution against the creature. You can only swallow one creature at a time. The swallowed creature can attack you from the inside but you have Resistance to all damage from it. The DC to escape is 8 + Proficiency + Constitution Modifier.
Iron Stomach: You are immune to Poison and Disease from anything you ingest.
Thunderous Roar: As an Action you may let out a brutal shout a 15ft cone (30ft cone underwater). Each creature must make a Constitution Saving Throw or take 2d6 Thunder damage. A successful save deals half damage. The DC for this saving throw equals 8 + your Constitution modifier + your Proficiency bonus. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. You can’t use it again until you complete a Short or Long rest.
"Kohola are the largest of the Sawgrim and have the biggest of appetites. Unlike their relatives, they are just fine eating things other then meats. As long as it is something to feed their hunger. They are slower swimmers and their dorsal fins are large but also sag quite a bit. They also have speckled patterns over their bodies instead of a single solid color like other Sawgrim. The patterns vary from person to person."