|This article is about the Crabsnake. You may be looking for the Crabsquid.|
The Crabsnake has a long, serpentine body with two long, translucent fins running from the neck, down the sides of its body, to the end of the tail. These fins undulate as it moves and emit a violet bioluminescent glow. The top of its body is bright pink, with horizontal reddish-brown stripes every few feet along its entire length, along with many bright purple dorsal growths which appear to be from another life form, growing on the creature's back. It is possible that these are Jellyshroom spores growing on the Crabsnake in a similar fashion to how barnacles live on whales. Its underside is bright white in color. The Crabsnake's head sports two pairs of small fangs in its small, rectangular mouth, and two much larger black-tipped claws on either side. It has no visible eyes.
The Crabsnake waits inside a Jellyshroom in an upright position until the player gets too close. At that point it will spring out and grab them as a surprise attack. While being attacked by the Crabsnake the player is trapped in the same way they would be while being attacked by the Reaper Leviathan. Sometimes, after having finished its attacks, the Crabsnake falls back into the mushroom; other times it will leave and swims around the area. Unless agitated again by the player, it will eventually return to the Jellyshroom and wait again. It will also leave its mushroom on its own so it can patrol the surrounding area, or seek out another mushroom to reside in. The Crabsnake will attack the Seamoth for minor damage, the Prawn Suit for very minor damage, and will ignore the Cyclops. Crabsnakes can be observed peeking out of Jellyshrooms if the player approaches one in their submersible. They will not attack, however, and instead will let out hissing noises before going back into their mushroom.
Crabsnakes will lay their eggs inside the Jellyshroom. They can only be accessed after the Crabsnake leaves.
When Crabsnakes are damaged, they will shake violently. If it is near a Jellyshroom after taking damage, it will attempt to shelter within it.
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This lifeform appears to live in symbiosis with the local flora. All encountered specimens have been located within 50m of jellyshroom flora, frequently within the plants themselves.
- It's possible for Crabsnake to re-enter its home mushroom with the player inside it.
- The Crabsnake will attempt to reach its spawn point to "hide in" if spawned, even without a Jellyshroom.
- The Crabsnake might be based on the real-life bobbit worm, a marine worm that is also an ambush predator.