Common name: Striate boomerang coral

General information

The Elephant's Ear Coral, scientifically known as Herpolitha limax, is a distinctive species of coral that is popular among reef aquarium enthusiasts. This large polyp stony (LPS) coral is known for its elongated, tongue-like shape and its ability to inflate and deflate depending on the water flow and light conditions. The coral's common names, such as 'Mushroom Coral' and 'Slipper Coral', are derived from its unique appearance.

Herpolitha limax is a solitary coral, which means it does not form colonies like many other stony corals. Instead, it grows as a single, large polyp that can reach impressive sizes in the wild. Its coloration varies from shades of brown to green, with some specimens exhibiting vibrant blues and purples.

Care

Caring for Elephant's Ear Coral requires attention to water quality and lighting. They thrive in moderate to low water flow, which helps them to fully expand and display their natural beauty. Lighting should be moderate as well, as too intense light can cause stress and bleaching. It's important to provide a stable environment with consistent water parameters to keep this coral healthy.

Feeding Herpolitha limax is straightforward; they benefit from regular feedings of meaty foods such as mysis shrimp and finely chopped seafood. This supplemental feeding aids in their growth and maintains their vibrant coloration.

Symbiosis

While not known for hosting fish or invertebrates like some other corals, Herpolitha limax has a symbiotic relationship with zooxanthellae, photosynthetic algae that live within its tissues. These algae provide the coral with essential nutrients through photosynthesis, while the coral provides a protected environment and the compounds necessary for the algae's photosynthesis.

Habitat

Elephant's Ear Coral is found in the Indo-Pacific region, typically in shallow reef environments. They are often seen on reef flats and in lagoons, where they lie flat on the substrate. In the aquarium, they should be placed on the sand bed or on a flat rock where they can expand without obstruction from other corals or decorations.