Aquatic. The feesh can only breathe underwater.

Forever Feesh. If a creature comes into contact with the feesh, they suffer the effects of the Flop attack.

Forever Flopper. The feesh is immune to suffocation, and gains +30ft to walking speed when it should be suffocating. This trait can be removed with a splash of salty holy water after the feesh has been out of water for a full day.

Magic Immunity. The feesh is immune to magic.

Super High Flop. The feesh has a high jump of 300ft, and is immune to fall damage.

Flop. Melee Weapon Attack: +8 to hit, reach 5 ft. one target. Hit: If the target isn't a construct, ooze, or already a feesh, they turn into a feesh and act like a feesh. This process is only reversable if the target suffocates to death as a feesh.

Tail slap. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:  8 (1d4 + 6) feesh damage. If used while feesh is falling from a Super High Flop, it does 16 (4d4 + 6) feesh damage instead.