Sea Monster

HP 64
Appears on Sea
Notes Travels on water
Sea Monsters are the basic sea Creature in Ultima II, and it is generally easy to avoid fighting them if you want to. They don't dish out too much damage and they go down pretty easy, especially if you are Firing a Frigate's cannons.

Sea Monsters in towns are a different story. They always have a lot of HP and, like any town monster, they deal tons of damage. Combined with their aggression, you should always avoid Sea Monsters unless you have a Frigate (which you often will when you see them).
Compare Sea Monster to other Creatures
Set Creatures: Sea Monster – 7 shown
The location or world map where this creature is located
Location
This creature's starting hit points in this instance; some creatures are completely invincible and immune to all attacks
HP
This creature's default behavior; creatures with 'Special' behavior stand still but also have a special response when you Transact with them; if you attack any creature, that creature as well as all guards, monsters (except orcs), and anyone with a behavior of 'Pursue' will change their behavior to 'Attack'
Behavior
Port Bonifice 255 Attack
Port Bonifice 255 Attack
Port Bonifice 255 Attack
New San Antonio 255 Attack
New San Antonio 255 Attack
Pirates Harbour 255 Attack
Pirates Harbour 255 Attack
Worlds: Where Sea Monster may be Encountered – 13 shown
Extraterrestrial planets are external to Earth and only have one time period each
World
The year or time this world exists in, as described by the world's sign
Era
The first coordinate entered when using Hyperspace to travel to this world
Xeno
The second coordinate entered when using Hyperspace to travel to this world
Yako
The third coordinate entered when using Hyperspace to travel to this world
Zabo
Legends Legends - - -
Pangea 9,000,000 B.C. 6 6 6
B.C. 1423 B.C. 6 6 6
A.D. 1990 A.D. 6 6 6
Aftermath 2112 A.D. 6 6 6
Mercury - 5 4 5
Venus - 3 3 4
Mars - 6 2 3
Jupiter - 1 3 4
Saturn - 2 8 5
Uranus - 9 4 6
Pluto - 0 1 4
X - 9 9 9
Orc

Related

Ness creature

Location Sea
HP 51
Damage 2–21

Ness creature

Location Sea
Ranged This creature has a ranged attack

Serpent

Experience 15
Appears Sea
Notes Uses damage spell
Serpents are nasty enemies that use a targeted "spell" as an alternate attack. They are worth a lot of experience, but since they live in the water they can be difficult to engage.