Green Giant Cup Mushroom - Amplexidiscus sp.

SKU: 239612
Manufacturer: That Fish Place
MPN: 0215-mushroom

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Giant Cup Mushrooms (Amplexidiscus sp.) mimic flat anemones and mushroom polyps. They lie flat on a rock surface and spread out with their flat body covered in short tentacles. When a clownfish or another fish or invertebrate tries to host in or walk across the surface, the Giant Cup Mushroom closes over it and pulls it into its central mouth. These mushrooms do not actively hunt other organisms but will eat whatever triggers its feeding response. They should not be kept with clownfish or other small fish and invertebrates but are safe with corals and similar sessile (stationary) invertebrates and larger, stronger fish.

Giant Cup Mushrooms are fairly hardy and do well in low light environments. These mushrooms can grow very large - up to about 18 inches in diameter - and need plenty of room to expand. They should be placed in an area of low water movement. They are slightly photosynthetic but should also be fed meaty frozen foods on a periodical basis. Shrimp, clams, scallops, krill and other similar meaty foods should be placed on the surface of their disk.


Common NameGreen Giant Cup Mushroom
Scientific NameAmplexidiscus sp.
Water MovementLow
AggressivenessModerate to High
Light IntensityLow to Moderate
Specific Gravity Range1.022-1.026
pH Range8.0-8.4
Temperature Range75-78
Water Hardness8-12 dKH
Invert SafeYes, with caution
DietCarnivore, Photosynthetic

State Restrictions
Armed Forces Americas
Armed Forces Europe
Armed Forces Pacific
Puerto Rico


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This is an amazing coral and easy to keep. That Pet Place always has healthy coral that are resonably priced.