Giant Lamprey
Lampreys are eel -like fish with round mouths which latch onto prey items, keeping the lamprey attached so that it can feed. Once a victim takes damage from a lamprey’s blood drain, the lamprey remains attached, and the damage is automatic each round until the victim spends an action die to remove the creature (no check is required). Lampreys range in size from less than a foot to over 4 feet long. Any lamprey the size of a human arm or longer should be treated as a giant lamprey, but even these don’t reach more than 9 pounds. Lampreys are edible, and in some places may even be prized.
Summary
Init +0; Atk bite +4 melee (1 plus blood drain); AC 12; HD 1d6; MV swim 40’; Act 1d20; SP blood drain (Fort DC 15 or 1d3 Stamina per round after bite); SV Fort +3, Ref +4, Will -2; AL N.