Hammer - Toxic Green Branching

This coral receives most of its energy by utilizing the photosynthetic algae contained within its tissues. It can also absorb dissolved nutrients from the water and may be offered zooplankton coral preparations, rotifers, mysis shrimp, enriched brine shrimp, oyster eggs, etc.

Although Euphyllia corals can be quite hardy and not prone to pests, they are not tolerant of poor water quality and may fail to extend their polyps. Physical damage to the coral should be avoided at all cost, as it is prone to infectious brown jelly infection.

This coral should be provided with plenty of space as it may produce long, powerful sweeper tentacles; low water flow helps to minimize the growth of these tentacles.

With tentacles waving in the current in an almost hypnotic fashion, Hammer coral has charmed nearly every reef keeper at some point. Each tentacle ends in a single “T” shaped tip in a contrasting hue from its stalk.


Ultra Australian colors are always exceedingly bright and impressive, and usually fluorescence brightly under actinic lighting.
Water flow is best provided as turbulent flow with the use of a wave maker or surge action. Constant laminar flow is very damaging and could cause death of the coral. Alkalinity, calcium, magnesium and strontium are required for growth and should be checked regularly.

• Difficulty: Intermediate
• Growth Speed: Medium - Fast
• Lighting:Medium
• Average Placement: Middle - High
• Water Flow: Low - Medium
• Temperament: Aggressive