- For the Seaweed item obtained from fishing, see Fishing Junk.
海草 summons a turtle 寵物 that follows the player, like other pets. It lasts indefinitely and does not attack enemies nor take damage, and is purely for aesthetics. Seaweed is a rare item found in the 地下叢林's 叢林神龕s.
- It will use a propeller to hover to the player when out of reach.
- The turtle will occasionally poop, which disappears after about 10 seconds.
- On the mobile version, the seaweed obtained from fishing will have the description of a pet summoning item.
- It can be found in crates in the 3DS version.
- In the Mobile and 3DS versions, it does nothing, despite the tooltip.