Monstrous Scorpion, Huge (CR 7)

Huge Vermin
Alignment: Always Neutral
Initiative: +0; Senses: darkvision 60 ft., tremorsense 60 ft., and Spot +4

AC: 20 (-2 size, +12 natural), touch 8, flat-footed 20
Hit Dice: 10d8+30 (75 hp)
Fort +10, Ref +3, Will +3
Speed: 50 ft.
Space: 15 ft./10 ft.
Base Attack +7; Grapple +21
Attack: Claw +11 melee
Full Attack: 2 claws +11 melee and sting +6 melee
Damage: Claw 1d8+6, sting 2d4+3 plus poison
Special Attacks/Actions: Improved grab, constrict 1d8+6, poison
Abilities: Str 23, Dex 10, Con 14, Int -, Wis 10, Cha 2
Special Qualities: Vermin
Feats: -
Skills: Climb +10, Hide -4, and Spot +4
Advancement: 11-19 HD (Huge)
Climate/Terrain: Warm desert
Organization: Solitary or colony (2-5)
Treasure: None

Source: Monster Manual

Monstrous scorpions are vicious predators that make unnerving scuttling noises as they speed across dungeon floors. A monstrous scorpion has a low, flat body: 20 feet long, 10 feet wide* and 2-1/2 feet high**.
*The number includes the scorpion's body and its legs; the actual body width is about a third of the total.
**The number indicates the height of the creature's body; the creature's stinger usually is held about as high off the ground as the creature is wide.