PFRPG: Otter Animal Companion

I know that it has been months since I last posted. This is because I have been busy with my design work for the Martial Arts Guidebook. Which directly relates to this post. I created a martial arts style called Otter Style, and the NPC I built for it is a ranger. I thought that it would be silly to give a ranger who is a practitioner of Otter Style martial arts to have anything other than an otter for an animal companion. So, here it is:

Otter Companions
Starting Statistics: Size Small; Speed 20 ft., swim 30 ft.; AC +1 natural armor; Attack bite (1d4), tail slap (1d4); Ability Scores Str 13, Dex 17, Con 15, Int 2, Wis 12, Cha 6; Special Qualities low-light vision, hold breath.
4th-Level Advancement: Ability Scores Dex +2, Con +2; Special Qualities blindsense.

And here is the otter animal companion for a character with an Effective Druid Level of 3:

OTTER	Effective Druid Level
N Small animal	3
Init +4; Senses low-light vision; Perception +5
DEFENSE
AC 18, touch 14, flat-footed 12 (+4 Dex, +3 natural, +1 size)
hp 19 (3d8+6)
Fort +5 Ref +7 Will +2
Defensive Abilities evasion
OFFENSE
Speed 20 ft., swim 30 ft.
Melee bite +6 (1d4+3); tail slap +6 (1d4+3)
STATISTICS
Str 14, Dex 18, Con 15, Int 2, Wis 12, Cha 6
Base Atk +2; CMB +3; CMD 17 (21 vs. trip)
Feats Weapon Finesse,
Skills Escape Artist +5, Perception +5, Swim +9
SQ hold breath, tricks (attack, come, down, fetch, heel, perform, seek, stay)