Sea Monster Generator

God I love ocean stuff

Base Animal:

1. Whale
2. Cephalopod
3. Clam
4. Shark
5. Weird deep-sea fish
6. Aquatic version of terrestrial animal
7. Crustacean
8. Pinniped
9. Serpentine
10. Reptilian
11. Completely alien
12. Roll twice and combine 

Size: 

1. Human-sized, comes in schools
2. Size of a large crocodile
3. Size of a small whale
4. Size of a large whale
5. Absolutely massive, may carry an entire island
6. Comes in a wide range of sizes

Behavior:

1. Relentlessly aggressive
2. Hibernates for long periods
3. Placid unless disturbed
4. Will react to a certain stimulus (scent, color, etc) violently 
5. Goes through alternating periods of aggression and peacefulness 
6. Erratic, no set behavior pattern

Special Trait:

1. Amphibious
2. Highly intelligent
3. Can fly for short distances as an armored head it uses to ram into ships
4. Armored skin
5. Psychic powers
6. Waits in caves and holes to ambush prey
7. Absolutely gigantic mouth 
8. Echolocates, can stun prey with sonic blasts 
9. Has symbiotic organisms attached to it that will defend it 
10. Extremely fast/agile swimmer
11. Generates a vortex in its mouth to suck things in
12. Uses mantis shrimp-like shockwaves to hunt
13. Can change color for camouflage 
14. Poisonous 
15. Multiple heads
16. Horns or spikes
17. Generates electricity
18. Uses an anglerfish-like lure
19. Goes through various metamorphoses during its life 
20. Roll twice

Hook:

1. Has swallowed treasure
2. Has swallowed an important person who may be alive inside 
3. Body contains valuable resource 
4. Has been tamed by a faction and is used by them for various purposes
5. Follows a migratory pattern to a legendary island, can be followed to reach this island
6. A sea captain has sworn revenge on it and offers a high bounty for its corpse
7. Has cult that worships it 
8. Is about to attack a seaside town
9. Has started roaming an important trade route attacking ships 
10. Was mutated by magical radiation, the source of mutation is still active
11. A wealthy eccentric wants it captured alive to keep as a pet 
12. A naturalist is interested in studying it