Hippopotamus:
Large Animal
Hit Dice: 8d8+40 (76 hp)
Initiative: -1
Speed: 20 ft. (4 squares), swim 20 ft.
Armor Class: 14 (-1 size, -1 Dex, +6 natural), touch 8, flat-footed 14
Base Attack/Grapple: +6/+17
Attack: Bite +12 melee (2d6+10)
Full Attack: Bite +12 melee (2d6+10)
Space/Reach: 10 ft./5 ft.
Special Attacks: -
Special Qualities: Hold breath, scent
Saves: Fort +11, Ref +5, Will +3
Abilities: Str 24, Dex 9, Con 20, Int 2, Wis 12, Cha 3
Skills: Listen +7, Spot +6, Swim +15
Feats: Improved Bull Rush, Improved Overrun, Power Attack
Environment: Warm plains and forests (rivers)
Organization: Solitary, pair, or herd (10-15)
Challenge Rating: 6
Treasure: None
Alignment: Always neutral
Advancement: 9-16 HD (Large); 17-24 HD (Huge)
Level Adjustment: -
Dire Hippopotamus
Huge Animal
Hit Dice: 18d8+126 (207 hp)
Initiative: -2
Speed: 30 ft. (6 squares), swim 30 ft.
Armor Class: 18 (-2 size, -2 Dex, +12 natural), touch 6, flat-footed 18
Base Attack/Grapple: +13/+33
Attack: Bite +23 melee (2d8+12/19-20)
Full Attack: Bite +23 melee (2d8+12/19-20)
Space/Reach: 15 ft./10 ft.
Special Attacks: Improved grab
Special Qualities: Hold breath, scent
Saves: Fort +18, Ref +9, Will +8
Abilities: Str 34, Dex 6, Con 25, Int 2, Wis 14, Cha 8
Skills: Listen +15, Spot +14, Swim +20
Feats: Alertness, Die Hard, Endurance, Improved Bull Rush, Improved Critical (bite), Improved Overrun, Power Attack
Environment: Warm plains and forests (rivers)
Organization: Solitary or pair
Challenge Rating: 14
Treasure: None
Alignment: Always neutral
Advancement: 19-26 HD (Huge); 27-54 HD (Gargantuan)
Level Adjustment: -