Description
St. Thomas Mushroom – Ricordea sp. (Atlantic)
Ricordea sp., commonly known as the St. Thomas Mushroom, is a rare and highly sought-after Atlantic mushroom coral prized for its distinct texture, vibrant coloration, and limited availability in the marine aquarium trade. Originating specifically from the Caribbean, these mushrooms are recognized for their thick, bubble-like vesicles covering the oral disc, creating a richly textured appearance that sets them apart from Indo-Pacific mushroom species. Their scarcity, combined with strong visual appeal, makes them a standout piece for collectors and discerning reef keepers.
Unlike more commonly available mushrooms, St. Thomas Mushrooms are infrequently imported and often sold selectively, adding to their desirability as a premium soft coral.
Lighting: Low to moderate; prefers subdued to moderate lighting—excessive intensity may cause contraction or fading
Flow: Low; gentle, indirect flow allows full expansion and prevents detachment
Placement: Bottom to lower-mid areas on rockwork or isolated rubble to manage spread
Temperature: 76–80°F (24–27°C)
Salinity: 1.0265 SG (35 PPT)
pH: 8.1–8.4
Alkalinity: 8–10 dKH
Calcium: 380–450 ppm
Magnesium: 1250–1400 ppm
Nutrients: Moderate; tolerates elevated nutrients better than many stony corals
Feeding: Primarily photosynthetic; may benefit from occasional target or broadcast feeding of fine meaty foods
Aggression: Low to moderate; can overgrow nearby corals if not given space
Growth Rate: Slow to moderate; slower propagation contributes to its rarity
Care Level: Easy – hardy and forgiving once acclimated
Compatibility: Generally peaceful; best placed with adequate spacing from slower-growing or delicate corals
