Octopus

CR 1 - 400 XP - N Small Animal

Stat block

AC15 (touch 14, flat-footed 12)HP13 (2d8+4)SavesFort +5, Ref +6, Will +1Meleebite +5 (1d3+1 plus poison), tentacles +3 (grab)Speed20 ft., swim 30 ft., jet 200 ft.AbilitiesStr 12, Dex 17, Con 14, Int 2, Wis 13, Cha 3BAB / CMB / CMD+1 / +1 / 14Senseslow-light vision; Perception +1Environmenttemperate or cold ocean

Combat brain - every behavior cites its line (1 rules)

Built only from this entry: stat-block special attacks, the printed Int score, the creature type, its feats and senses, and the behavioral prose of its own description. Nothing invented - an uncited behavior is a test failure.

skirmisher (from abilities)
abilities: Dex 17 over Str 12 - strike and slip away, never trade full attacks

From the entry

An octopus can emit a 10-foot-radius sphere of ink once per minute as a free action. The ink provides total concealment in water, and persists for 1 minute. An octopus can jet backward once per round as a full-round action, at a speed of 200 feet. It must move in a straight line while jetting, and does not provoke attacks of opportunity when it does so. Bite: The octopus is a cunning animal capable of using complex tactics to get food.