colonial

I bought a coral and noticed hydroids all along the base of it when it was in quarantine. They were irritating the coral at the base and I had stn. I fragged the healthy coral bits into a new plug and discarded the old plug with the hydroids and all. I must have missed the tiniest polyp or...

Hello, I work at an aquarium for starters. We have a coldwater seahorse tank (63°F) with nothing else in it. The tank has a ton of these anemone like guys. They look to be potentially colonial? It doesn't seem to bother the potbelly seahorses at all! But when I scrub the tank they seem to be...