This evil shark is known as the reaper of the seas due to its jet-black body and ferocious nature. Like other sharks, its skeletal frame is composed entirely of cartilage. Because of this, despite its imposing size, it leaves not a single bone behind after it dies. All that remains are its sharp teeth, which ancient people believed to be the remnants of a mighty, godlike creature.
As a summoned, template, creature, this creature has several changes. Anything noted with  is what it gains from the template associated with the summoners’ alignment. Divine is always listed first, and Unholy afterwards.
Black Shark (CR 4)
NE Huge Divine / Unholy Animal (Aquatic [holy/shadow])
Init +5; Senses blindsense 30 ft. [darkvision +60 ft./darkvision 120 ft. and see in darkness], keen scent; Perception +9
[Aura Sacred Aura/Profane Aura]
AC 16, touch 9, flat-footed 15 (+1 dex, +7 natural, -2 size)
hp 34  (5d8+12)
Fort +9, Ref +5, Will +2
Resist Water 10 [holy 10/shadow 10]
Weakness Lightning [shadow/holy]
Speed swim 60 ft. [70 ft]
Melee Bite +7 (2d6+7 [+1d6 holy/shadow]/19-20 plus grab and deprotect)
Space 15 ft.; Reach 10 ft.
Special Attacks Crunch, Deprotect (Deprotect, DC 15 Fort save, 1d4 turns), Reteethe, Swallow Whole (2d6+7 damage, AC 13, 5 Hp)
Str 21, Dex 13, Con 17, Int 2, Wis 12, Cha 2
Base Atk +3; CMB +10 (+14 grapple); CMD 20
Feats Great Fortitude, Improved Initiative, Weapon Focus (Bite)
Skills Perception +9, Swim +14
Once every 1d4 rounds as a swift action, the black shark can bite an additional time while tearing some flesh from their opponent. If they succeed at hitting with their bite attack, the damage is 2d6+7 plus 2d4 bleed per round for 2 rounds.
Whenever a black shark confirms a critical hit, they gain +2 temporary strength bonus (max +4) for 4 rounds. This can be refreshed.
Divine – Sacred Aura (Su)
A divine creature emits supernatural light in a 10-foot radius around it. All those within the area of effect take 1d6 holy damage plus an additional 1d6 holy damage for every 5 racial HD the base creature has. A divine creature can suppress or resume the use of this ability as a free action.
Unholy – Profane Aura (Su)
An unholy creature emits supernatural darkness in a 10-foot radius around it. All those within the area of effect take 1d6 shadow damage plus an additional 1d6 shadow damage for every 5 racial HD the base creature has. An unholy creature can suppress or resume the use of this ability as a free action.