by Saltwater Smarts | Mar 8, 2020 | Invertebrates Anemones are iconic marine organisms that have long captured the imagination of saltwater aquarium hobbyists. Unfortunately, many of these iconic critters are poorly suited to life in the average home aquarium. Even those that are generally considered good aquarium candidates, such as the popular bubble-tip anemone (Entacmaea quadricolor), are still demanding in terms of their physical environment and must be placed in a system designed around their specific needs and behaviors. The good news is, hobbyists who are seeking a beautiful but more accommodating anemone species can find what they’re after in the flower anemone, aka rock flower anemone (Phymanthus crucifer*). This Caribbean denizen is very hardy and tolerates a fairly wide range of aquarium conditions, making it a good choice for reefkeepers of virtually all experience levels, even beginners. Physical appearance At first glance, P. crucifer could be mistaken for an especially gorgeous type of mushroom anemone. The tentacles, which surround the margin of the oral disc, can be smooth but are often beaded or ridged.