Ocean Strider (CR 18)

Huge Fey (Aquatic)
Alignment: Always chaotic neutral
Initiative: +5 (+1 Dex, +4 Improved Initiative); Senses: low-light vision, Listen +41, and Spot +41
Languages: Common, Elven, and Aquan


AC: 19 (-2 size, +1 Dex, +10 natural), touch 9, flat-footed 18
Hit Dice: 30d6+60 (165 hp); DR: 15/cold iron
Fort +12, Ref +18, Will +23
Speed: 50 ft., swim 60 ft.
Space: 15 ft./15 ft.
Base Attack +15; Grapple +18
Attack: Masterwork falchion +18 melee and tail slap +12 melee, or Masterwork trident +18 melee and tail slap +12 melee, or tail slap +17 melee
Full Attack: Masterwork falchion +18/+13/+8 melee and tail slap +12 melee, or Masterwork trident +18/+13/+8 melee and tail slap +12 melee, or tail slap +17 melee
Damage: Masterwork falchion 2d8+6/18-20, Masterwork trident 4d6+6, tail slap 1d6+2 (secondary) or 1d6+6 (primary)
Special Attacks/Actions: Frightful presence, ramming, spell-like abilities
Abilities: Str 19, Dex 13, Con 15, Int 16, Wis 22, Cha 14
Special Qualities: SR 28, amphibious, water walk
Feats: Alertness; Blind-fight; Cleave; Combat Expertise; Dodge; Improved Initiative; Imporved Improved Sunder; Mobility; Power Attack; Spring Attack; Whirlwind Attack
Skills: Hide +26, Intimidate +35, Jump +37, Knowledge (nature) +38, Listen +41, Search +36, Spot +41, Survival +39, and Swim +45
Advancement: By character class
Climate/Terrain: Any aquatic
Organization: Solitary
Treasure: Standard

Source: Monster Manual II