This creature looks like something fused the front half of a white-furred rabbit to the rear half of a shark; two rows of shark teeth line the inside of its mouth.
Bunyibble CR 1
CN Small magical beast (aquatic)
Init +2; Senses darkvision 60 ft., keen scent 180 ft., low-light vision; Perception +9
AC 15, touch 13, flat-footed 13 (+2 Dex, +2 natural, +1 size)
hp 13 (2d10+2)
Fort +4, Ref +5, Will +1
Speed 20 ft., swim 40 ft.
Melee bite +5 (1d6–2 plus bleed)
Special Attacks bleed (1d2), blood rage
Str 6, Dex 15, Con 13, Int 7, Wis 12, Cha 10
Base Atk +2; CMB –1; CMD 11
Feats Go Unnoticed[B], Weapon Finesse
Skills Acrobatics +6 (+2 to jump), Perception +9, Stealth +10, Swim +6; Racial Modifiers +4 Perception, +4 Stealth
Environment any aquatic
Organization solitary, pair, or fluffle (3–20)
Blood Rage (Ex) If another bunyibble is injured within range of a bunyibble's keen scent, it flies into a rage. This ability otherwise works as normal.
Despite the bunyibble's fearsome features, the creature is actually fairly shy and attempts to stay hidden from larger creatures. Larger and more aggressive bunyips enjoy bunyibble flesh, as do sharks, prompting the smaller bunyibble to learn to hide from anything it considers a predator. However, once a creature injures a bunyibble, it goes into a frenzy (along with any nearby bunyibbles) and will not return to its normal, docile state until its attacker is dead. Many foolish hunters have met their demises after spearing a solitary bunyibble, only to come under attack by a dozen enraged shark-bunnies who turn the water red with their foes' blood.
Owing to its typical docility, a bunyibble can be taken as a familiar by a chaotic 7th-level spellcaster with the Improved Familiar feat. The spellcaster can choose to enter blood rage when her bunyibble familiar is injured, but she cannot end the rage voluntarily afterwards.