1-2″ when fully open!

The Bubble Tip Anemone (entacmaea quadricolor) is known to saltwater aquarist as being one of the easiest sea anemones to keep, but this marine invertebrate does require some basic water and lighting parameters as well as proper supplemental feeding. There are several other plus sides apart from being lower maintenance: these anemones are one of the most prone to host clownfish, are more colorful than most long-tentacled anemones, less predatory than carpet anemones, and can be propagated relatively easily.