Wiktionary
seaweedlike
a. Resembling or characteristic of seaweed.
Usage examples of "seaweedlike".
Irregular, seaweedlike growths fringed the bizarre creature all the way around its flattened periphery, with those in front being by far the most attenuated and prominent.
The apparition, with black seaweedlike shreds hanging from its body, looked like something that belonged not to this world but to the deepest reaches of an alien planet.
The evacuation pump started up, and he saw the seaweedlike growths wave as the water was spouted out of the bottom aperture.