Deepmaw

"But the Lord sent a great fish to swallow Jonah."
Jonah 2:1

Freshwater Predators. Those who frequent the hazardous waters of Mesopotamia are well-acquainted with the massive freshwater predator known colloquially as the "Deepmaw." Deepmaw are known to attack in swamps and the shallows of rivers where they can stalk their prey from just below the surface of the murky waters. Deepmaw lunge from the water, attempting to swallow their prey whole before sinking back beneath the surface to digest their meal.

"As Tobias washed his feet in the Tigris, a large fish seized his foot to swallow him."
Tobit 6:3

Huge Beast, unaligned

Armor Class 12

Hit Points 122

Speed 5 ft., swim 40 ft.

STR	DEX	CON	INT	WIS	CHA
16 (+3)	12 (+1)	14 (+2)	4 (-3)	10 (+0)	4 (-3)

Skills Stealth +3

Senses Blindsight 30 ft., Passive Perception 12

Challenge 3 (700 XP)

Features

Water Breathing. The deepmaw can breathe under water and hold its breath on land for up to 30 minutes.

Actions

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 12 (2d8+3) piercing damage and the target is grappled.

Bonus Actions

Swallow. The deepmaw swallows a medium or smaller target it is grappling, ending the grapple on it. The swallowed target is Blinded and Restrained, it has total cover against attacks and other effects outside the deepmaw, and it takes 5 (2d4) acid damage at the start of each of the deepmaw's turns. The deepmaw can only have one target swallowed at a time. If the deepmaw dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 5 ft. of movement, exiting prone.

Bible5e custom monster. Its specific traits supplement the current rules. See Using Bible5e Monsters.