Hydroids
From The Aquarium Wiki
Hydroids plant-like are carnivorous animals, related to jellyfish, sea anemones and corals. They catch prey in the water column with the aid of stinging and grappling nematocysts.
Hydroids plant-like are carnivorous animals, related to jellyfish, sea anemones and corals. They catch prey in the water column with the aid of stinging and grappling nematocysts.