The hybrid can breathe air and water.

The hybrid has a strong, sticky tongue that can reach up to ten feet to attack or grapple it's prey.

The Hybrid has a large maw, able to crush and swallow its prey whole.

Devour: The Hybrid makes one bite Attack against a target it is Grappling with it's tongue, the target must be at least one size category smaller than the Hybrid. If the Attack hits, the target is swallowed, and the grapple ends. The swallowed target is Blinded and Restrained, it has total cover against attacks and other effects outside the Hybrid, and it takes 2d6 acid damage at the start of each of the Hybrid's turns, this damage increases by 1d6 at levels 5 (3d6), 10 (4d6), 15 (5d6) and 19(6d6). The Hybrid can have only one target swallowed at a time and each foot of movement for the Hybrid costs 2 feet of movement if the devoured creature is conscious. 
The hybrid may spit out the Devoured Creature as an action
If the Hybrid is incapacitated, a swallowed creature is no longer Restrained by it and can escape from the devour using 5 feet of Movement, exiting prone. The devoured creature may also use it's action on it's turn to make a contested athletics check against the hybrid, if successful, the creature escapes the devour and uses 5 feet of Movement, exiting prone.

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.

The Hybrid's long jump is up to 20 ft. and its high jump is up to 10 ft., with or without a running start.

The hybrid is designed to be physically well rounded and gains a +1 increase to STR, DEX, and CON.

The Hybrid can speak, read, and write Common and Sahuagin.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.