Tiny Beast
Armor Class 12
Hit Points 2 (1d4)
Speed swim +30, walk +30
Challenge 1/8
Senses blindsight 10 ft., passive Perception 10
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 1 piercing damage and the target makes a DC 10 Constitution saving throw taking 5 (2d4) poison damage on a failure or half damage on a success.
Source: Level Up Advanced 5e Monstrous Menagerie · OGL/Open