The Green Bubble Tip Anemone is ideal for established reef tanks with plenty of rocks to attach to. It has bulb-shaped tentacles that extend to catch food and retract afterward. It needs at least a 30-gallon tank with strong lighting to stay healthy and avoid stretching. These anemones can grow up to 12 inches wide but usually stay smaller. They do well with clownfish, which help feed them, or you can supplement their diet with chopped fish, shrimp, or worms. Handle carefully, as they can sting and harm nearby tank mates if crowded.