Florida ricordea

Geographical Origin and Habitat: The Florida Ricordea (*Ricordea florida*) is a highly sought-after, spectacularly colored Corallimorph natively endemic to the warm, sunlit, shallow coral reefs and rocky coastal zones of the Caribbean Sea, the Gulf of Mexico, and the Florida Keys. Their natural biotope is defined by highly illuminated, relatively shallow rocky substrates where they form dense, sprawling colonies, often dominating horizontal rock shelves exposed to moderate tidal currents.

Taxonomy: Scientifically classified within the Ricordeidae family, they occupy an evolutionary position between true sea anemones and stony corals, completely lacking a hard skeleton. Morphologically, they are distinguished from smooth *Discosoma* mushrooms by their highly textured surface. The broad, fleshy oral disc is densely covered in tightly packed, short, spherical or club-shaped tentacles (often described as resembling bubble-wrap or tiny grapes), with a distinct central mouth.

Social Behavior: They are sessile, peaceful, but highly territorial invertebrates. Unlike *Euphyllia* corals, they do not possess long, stinging sweeper tentacles, making them relatively safe for neighboring corals. However, they are aggressive space colonizers. They reproduce asexually and will slowly but relentlessly encrust over the rockwork, forming a dense carpet that can physically smother slower-growing or encrusting stony corals if their expansion is not managed.

Coloration and Sexual Dimorphism: Sexual dimorphism is non-existent due to their clonal reproduction. Their coloration is the primary reason for their immense popularity; they are among the most vibrantly colored organisms in the ocean. The bubble-like tentacles can present in solid, contrasting, or multi-ringed patterns of blinding neon green, electric blue, fiery orange, bright yellow, and deep purple. Under actinic blue LED lighting, they exhibit intense, breathtaking fluorescence.

Tank Setup: The aquarium architecture must accommodate their need for solid substrate and moderate lighting. A minimum 40-liter (10-gallon) nano-reef is perfect.

CRITICAL REQUIREMENT: They should be securely placed on horizontal or gently sloping rockwork in the lower to middle sections of the aquarium. They require moderate, turbulent water flow—enough to keep detritus from settling on their textured surface, but not so strong that the fleshy disc is violently folded or blasted off the rock.

Diet and Feeding: They are primarily autotrophic, deriving the majority of their daily energy from the photosynthesis performed by their symbiotic zooxanthellae algae. Therefore, appropriate lighting is crucial. However, unlike *Discosoma*, *Ricordea florida* are capable and willing active feeders. Target feeding them 1-2 times a week with frozen Mysis shrimp, Calanus, or specialized coral powder (gently sprayed over the disc with a pipette) will result in drastically accelerated growth and reproduction.

Water Quality: They are exceptionally hardy and forgiving, making them an excellent choice for beginners transitioning into corals. They demand stable tropical heat (24-27°C / 75-81°F). Specific gravity (salinity) MUST be maintained between 1.023 and 1.025. They require hard, highly alkaline water (pH 8.1 - 8.4). They thrive in water with low to moderate Nitrates (2-10 ppm); they will frequently pale or shrink in ultra-low nutrient, sterile aquarium systems.

Compatibility and Tankmates: Compatibility requires strategic placement to manage their eventual spread. They are 100% peaceful toward fish and mobile invertebrates.

CRITICAL WARNING: Do not place them immediately adjacent to delicate, encrusting SPS corals (*Montipora*, *Cyphastrea*), as the *Ricordea* will eventually grow over and smother them. They can be safely kept in a dedicated "Ricordea Garden" where multiple color morphs will happily grow together without stinging each other.

Aquarium Breeding: Propagation in the home aquarium is frequent and straightforward. They naturally reproduce through asexual pedal laceration or longitudinal fission (the mushroom slowly splits itself in half, forming two distinct mouths before separating). Aquarists can also force propagation by surgically cutting the mushroom in half directly through the mouth using a sterile razor blade. The halves will rapidly heal and form perfect, circular clones within weeks.

Risks and Diseases: The primary risk to *Ricordea* is excessively intense lighting; if placed too high in the tank under modern LEDs, they will rapidly bleach (expel their zooxanthellae) and shrink. The second risk is inadequate flow, allowing detritus to settle between the bubbles and cause bacterial brown jelly infections. The third risk is chemical warfare from aggressive neighbors; stinging LPS corals like *Euphyllia* will quickly melt a *Ricordea* if their sweeper tentacles touch.