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Information
The Hammer Coral is a large polyp stony (LPS) coral and often referred to as Euphyllia Hammer Coral or Anchor Coral. Its common names are derived from the appearance of its hammer-, or anchor-shaped tentacles. Its polyps are visible throughout the day and night and hide its skeletal base.
Lighting
Hammer corals only require a moderate amount of light for photosynthesis and can grow well in the intermediate regions of your tank. Just about any reef LED lighting should be sufficient for most tanks.
Water Flow
Moderate to strong water movement is recommended. One of the main draws to this type of LPS coral is how it sways in the current. Water flow is both healthy for the Hammer and is pleasing aesthetically.
Feeding
Hammer corals are more subdued eaters who would benefit from the occasional feeding of a meaty marine food like mysis shrimp. Feeding is fairly straightforward. Use Julian's thing or a Sea Squirt feeder and push the soft, meaty food into the polyps. The coral may eat some of whatever your fish don't steal away.