This uses only Core Rules for your convenience.
AC 23, touch 14, flat-footed 20
hp 38 (10 HD)
Fort +6, Ref +8, Will +11
Weaknesses light blindness, freshwater sensitivity, water dependent
Spd 30 ft., swim 60 ft.
Melee 2 talons +7 (1d4+1) and bite +5 (1d4)
Ranged ray +9 touch (per spell)
Base Atk +6; Grp +7
Special Atk blood frenzy, rake +5 (1d4+1)
Combat Gear potion of cure serious wounds
Spells Known (CL 8)
4th (3/day)—Evard's black tentacles
3rd (5/day)—dispel magic, summon monster III
2nd (7/day)—blindness/deafness (DC 14), darkness, mirror image
1st (7/day)—animate rope, mage armor (included in stats above), magic missile, ray of enfeeblement, shield
0 (6/day)—daze (DC 12), detect magic, flare, ghost sound (DC 12), light, message, read magic, resistance
Str 12, Dex 16, Con 15, Int 14, Wis 14, Cha 15
Feats Augment Summoning, Great Fortitude, Multiattack (b), Spell Focus (conjuration), Spell Penetration
Skills Concentration +10, Hide +16, Listen +11, Spellcraft +10, Spot +15, Swim +16
SQ summon familiar
Possessions combat gear, ring of protection +1, Heward's handy haversack, brooch of shielding (69 points left), elemental gem (water), 900 gp
Blindsense (Ex): A sahuagin can locate creatures underwater within a 30-foot radius. This ability works only when the sahuagin is underwater.
Blood Frenzy: Once per day a sahuagin that takes damage in combat can fly into a frenzy in the following round, clawing and biting madly until either it or its opponent is dead. It gains +2 Constitution and +2 Strength, and takes a -2 penalty to Armor Class. A sahuagin cannot end its frenzy voluntarily.
Rake (Ex): Attack bonus +5 melee, damage 1d4+1. A sahuagin also gains two rake attacks when it attacks while swimming.
Freshwater Sensitivity (Ex): A sahuagin fully immersed in fresh water must succeed on a DC 15 Fortitude save or become fatigued. Even on a success, it must repeat the save attempt every 10 minutes it remains immersed.
Light Blindness (Ex): Abrupt exposure to bright light (such as sunlight or a daylight spell) blinds sahuagin for round. On subsequent rounds, they are dazzled while operating in bright light.
Speak with Sharks (Ex): Sahuagin can communicate telepathically with sharks up to 150 feet away. The communication is limited to fairly simple concepts such as "food," "danger," and "enemy." Sahuagin can use the Handle Animal skill to befriend and train sharks.
Water Dependent (Ex): Sahuagin can survive out of the water for 1 hour per 2 points of Constitution (after that, refer to the drowning rules).