Bite

Melee Weapon Attack: +4 to hit, 5 ft., one creature,. 5 (1d6+2) piercing damage and barnacle attaches to target. While attached barnacle doesn't attack. Instead at start of each of barnacle's turns target loses 5 (1d6+2) hp due to blood loss. Barnacle can detach itself by spending 5 ft. of its movement. A creature including target can take its action to detach barnacle via DC 12 Str check. When barnacle is removed target takes 2 (1d4) piercing damage. If creature ends its turn with barnacle attached to it that creature: DC 12 Con save or contract barnacle shivers (see above).