Pearl Bubble Coral Green (LPS) (Physogyra lichtensteini)

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Pearl Bubble Coral Green (LPS)
Physogyra lichtensteini
Pearl Bubble Coral Green (LPS) (Physogyra lichtensteini)
Name Pearl Bubble Coral Green (LPS)
Name Lat. Physogyra lichtensteini
Family Hammer Corals
Family lat. Euphylliidae
Order Stony Corals
Order lat. Scleractinia
Origin Indo-West Pacific, Red Sea
Diet Autotrophic, planktivore
pH 8.1-8.4
Hardness 8-10 °KH
Lighting Medium
Current Moderate
Behavior Aggressive
Keeping Colony
Care Level Moderate
Life Span N/A
Protection CITES Appendix II; EC Annex B
Metric Units
Size 10-80 cm
Temperature 24-27 °C
Salinity 33-36 ‰
Aquarium 200 l
US Units
Size 4"-30"
Temperature 75-81 °F
Salinity 1.020-1.025 sg
Aquarium 50 gal

Distribution and habitat

Physogyra lichtensteini belong to the group of LPS (Large Polyp Scleractinia). These reef-building corals are widely distributed in the Red Sea, tropical Indian and Western Pacific Oceans. They occur in colonies on rubble surfaces in the forereef and in the calmed shallow water differently colored up to 20 m depth.


They should be positioned in a place with medium light intensity and moderate, alternating current. Only lime-rich, heavy metal-free substrates should be used as substrate

Filters, skimmers and heaters are necessary to ensure water quality, as well as pumps to simulate tides, swells and bottom currents. It is recommended that live stones be used to set up the aquarium. The bacteria living in the porous stones act as a biological filter. The lighting must correspond to the species-appropriate day-night rhythm of the animals

Salinity: 33-36 ‰ pH value: 8.1-8.4
Carbonate hardness: 8-10 °KH Nitrate content: 2-8 mg/l
calcium content: 420-450 mg/l Nitrite content: 0.0-0.05 mg/l
Magnesium content: 1.250-1.350 mg/l phosphate content: 0.01-0.1 mg/l

Regular addition of trace elements, especially calcium and strontium, is recommended. For salinity, an average value should be aimed for, which may only vary slightly by +/- 0.5 ‰. Ammonia and ammonium must not be measurable. Special attention shall be paid to consistently good water quality and water values.


Zooxanthellae, which are unicellular symbiotic algae, live in their tissue and provide them with assimilation products of their photosynthesis (light requirement). The zooxanthellae promote growth and provide additional food to the plankton and small particles that are collected in large quantities from the water current. Thus, in addition to the food produced in the aquarium during fish feeding (mysis, krill, Artemia, etc.), commercially available supplementary food in the form of phyto- and zooplankton should be offered regularly

Regular and varied feeding promotes health and prevents deficiency symptoms.

Behaviour and compatibility

They should not be kept with fish that consider their polyps food (e.g., angelfish or butterflyfish). Since they are heavily nettled and expand a great deal during the day and develop long tentacles during twilight, a sufficient distance from other corals must be maintained. They are sensitive to touch.

Reproduction and breeding

In nature, reproduction is sexual via larval stages. Reproduction through the formation of daughter colonies (budding) is possible.

Species protection

Species protection: WA Appendix II; EU Appendix B. The proof of purchase is the required proof of origin for the animal. Please keep it safe! Your pet store will be happy to provide you with further information.


The bubbles serve to increase the surface area for the zooxanthellae. They are very aggressive towards other corals. Physogyra are easily confused with Plerogyra. Physogyra have smaller, more pointed bubbles. Supplemental Actinic light (short wavelength, violet-blue light) illumination is very beneficial to their growth (zooxanthellae). A calcium reactor and magnesium metering pump are recommended for the necessary steady supply of calcium carbonate and magnesium. Too high temperature, insufficient lighting or current as well as sudden change of water values can lead to tissue decay (RTN - rapid tissue necrosis). When purchasing, look for pressure marks or other tissue damage. Newly introduced animals must be acclimated slowly to the water in the aquarium. If different species are kept together, make sure that fish and invertebrates match each other in terms of water quality and temperature requirements as well as their social behavior, and that the setup meets the ecological needs of all species kept together

Further literature can be found in your pet store.


Text: petdata; Image: petdata

Source: ENGELMANN & LANGE (2011): Zootierhaltung - Tiere in menschlicher Obhut: Wirbellose, Verlag Harri Deutsch; VERON (2000): Corals of the world, Australian Institute of Marine Science