Darkvision 60 ft
Traits
Amphibious
The monster can breathe air and water.
Standing Leap
The monster's Long Jump is up to 20 feet and its High Jump is up to 10 feet with or without a running start.
Actions
Bite
. . If the target is a Medium or smaller creature, it has the Grappled condition (escape DC ).
Swallow
The monster swallows a Medium or smaller target it is grappling.
While swallowed, the target isn't Grappled but has the Blinded and Restrained conditions, and it has Total against attacks and other effects outside the monster.
In addition, the target takes damage at the end of each of the monster's turns. The monster can have only one target swallowed at a time, and it can't use Bite while it has a swallowed target.
If the monster dies, a swallowed creature is no longer Restrained and can escape from the corpse using 5 feet of movement, exiting with the Prone condition.