- Length:30 meters
- Tentacle Length:80 meters
- Mass:60,000 tons
- Tentacle Arms: The Seaweed Monster has six tentacle like arms in which it can use to ensnare foes and attack enemies.
- Seaweed Absorb: The Seaweed Monster can absorb other mutant seaweed to grow even larger.
Weaknesses: The sun will quickly dry it out and eventually cause it to burn.
First Appearance: Godzilla: The Seaweed Monster (1978)
Rising from the depths to wreak havoc on mankind, the Seaweed Monster grew at an alarming rate. Highly energized by radiation, the fiend quickly attacked Brock and Quinn went they went diving. Fortunately for the pair, Godzooky managed to rescue them, but the creature wasn't far behind. It attacked the Calico, but a quick call to Godzilla would save the day!
The King of the Monsters rose from the ocean to do battle with this freaky foe. In the end, the Seaweed Monster was forced to retreat, but it was far from dead. Pieces of the creature aboard the Calico began to mutate and form new monsters while the larger one headed directly for the coastline.
The Calico managed to dump the two smaller beasts, but they simply joined with the parent creature. Godzilla was again called into action and as the two fought, Quinn discovered that the seaweed was quickly dried and killed when out in the sun. Now knowing this, Godzilla hoisted the creature onto his back and began to head for land. The blazing sun quickly began to dry the monstrosity out and soon, with a blast of his eye beams, the Seaweed Monster was permanently destroyed.