Jellyfish, Giant

The bell of this enormous amber jellyfish is as large as a carriage. A sinister bloom of tentacles dangles and writhes below.
 

Jellyfish, Giant (CR 7)

Large Vermin (Aquatic)
Alignment: Neutral
Initiative: +2
Senses: Darkvision 60 feet; Perception +0
  Speed: Swim 20 feet
Space: 10 feet
 

Defense

Armor Class: 11, touch 11, flat-footed 9 (+2 Dex, -1 size)
Hit Points: 94 (9d8+54)
Saving Throws: Fort +12, Ref +5, Will +3
Amorphous
Damage Reduction: 10/ piercing or slashing
Immunity: mindaffecting effects
 

Offense

Melee: 4 tentacles +9 (1d6+4 plus poison)
Reach: 15 feet
 

Statistics

StrDexConIntWisCha
18 (+4) 15 (+2) 22 (+6) - 11 (+0) 1 (-5)
Base Attack Bonus: +6
CMB +11
CMD 23 (can't be tripped)
  Feats:
  Skills: Swim +12
  Languages:
  Special Qualities: Compression

 

Special Abilities

Poison (Ex)

Tentacles-injury; save Fort DC 17; frequency 1/round for 6 rounds; effect 1d4 Con; cure 2 consecutive saves. The save DC is Constitution based.
 

Ecology

Environment: Any Oceans
Organization: solitary, pack (2-5), or bloom (6-12)
Treasure: None

  Unlike its smaller cousins, the giant jellyfish is an active predator that seeks out prey. Capable of slithering through narrow cracks, a giant jellyfish is a horrifying beast to encounter lurking in the hold of a flooded or sunken ship.
  Other species of these vermin exist, as summarized on the following table-these variants often have different types of poison or other abilities like translucency or constriction.
  Species CR Size HD Death's head jellyfish 1 Small 2 Crimson jellyfish 4 Medium 5 Sapphire jellyfish 11 Huge 12 Vampire jellyfish 14 Gargantuan 16 Whaler jellyfish 17 Colossal 20