n small animal aquatic 

Perception +4; low-light vision

Skills Athletics +6, Stealth +7

Str +1 Dex +2 Con +2 Int -5 Wis +1 Cha -1

AC  16; Fort +7, Ref +7, Will +4

HP 18

Speed 5 feet, swim 30 feet

Melee [>] jaws +6, Damage 1d6+3 piercing

Melee [>] tail +6 (agile), Damage 1d4+1 bludgeoning plus 1d4 electricity and stunning shock

Stunning Shock (incapacitation) A creature critically hit by the electric eel's tail must attempt a DC 17 Fortitude save. Critical Success The creature is unaffected.Success The creature is stunned 1.Failure The creature is stunned 2.Critical Failure The creature is stunned 3.

Bestiary, page 142.