Size: 4 inches Cynarina corals (Cynarina lacrymalis), often called “button corals” or “cat’s eye corals,” are large-polyp stony (LPS) corals known for their single, large, fleshy polyp and striking translucent coloration with vivid patterns or glowing centers. When fully expanded, they can look like a soft, inflated bubble, making them a beautiful and eye-catching centerpiece in reef aquariums. They are generally hardy but can be sensitive to improper conditions. Care GuideCynarina prefer low lighting and very gentle, low water flow to allow their tissue to fully expand without stress. They thrive in stable water conditions (temperature ~76–80°F, salinity ~1.025, alkalinity 8–9 dKH, calcium 400–450 ppm, magnesium 1250–1350 ppm) and can retract if conditions fluctuate. They should be placed on the sand bed with plenty of space around them. While they rely on photosynthesis, they benefit greatly from occasional feeding of small meaty foods like mysis shrimp or finely chopped seafood, especially at night when feeding tentacles are extended.
