Fimbriaphyllia paradivisa
Branching frogspawn coral, a popular aquarium species with improved conservation status.
Fimbriaphyllia paradivisa, better known as the branching frogspawn coral, is a large-polyped stony coral from the Euphylliidae family. Its branching growth pattern sets it apart from *Euphyllia divisa*, which forms a wall-like structure, though both are called frogspawn coral. This species is a popular choice for marine aquarium keepers.
Once listed as vulnerable on the IUCN Red List, its conservation status was upgraded to least concern in 2024. Despite this improvement, the coral faces threats from rising sea surface temperatures, ocean acidification, and overcollection for the aquarium trade. The National Oceanic and Atmospheric Administration has warned that *Euphyllia paradivisa* still faces “a risk of extinction within the foreseeable future.”
Colonies consist of separate, branching corallites. The polyps have branching tentacles, and the overall color is typically pale greenish-grey, with pink appearing rarely. Lighter tips on the tentacles are common. Under blue-dominated light, the coral fluoresces due to excitation of chromatophores in its zooxanthellae and host pigments.
This species is native to Indo-Pacific islands, with most of its population concentrated in the Coral Triangle. It also occurs in American Samoa. *Fimbriaphyllia paradivisa* favors sheltered spots on fringing reef crests, mid-slope terraces, and lagoons, avoiding areas with strong surface wave action. It lives at depths ranging from 2 to 25 meters.
- Common name
- branching frogspawn coral
- Family
- Euphylliidae
- Iucn status 2024
- least concern
- Previous iucn status
- vulnerable
- Depth range
- 2 to 25 meters (6.6 to 82.0 ft)
- Native region
- Indo-Pacific islands, Coral Triangle, American Samoa
Lore & Background
Fimbriaphyllia paradivisa shares the common name 'frogspawn coral' with Euphyllia divisa, but is differentiated as the 'branching' frogspawn due to its colony structure of branching, separate corallites. Its polyps have branching tentacles, and the color is pale greenish-grey or pink (in rare instances) with lighter tentacle tips. The coral displays fluorescence when the chromatophores of its zooxanthellae and the coral host pigments are excited by blue-dominated light.
It is native to the Indo-Pacific islands, distributed mostly in the Coral Triangle area, and also found in American Samoa. It prefers environments protected from surface wave action on fringing reef crests, mid-slope terraces, and lagoons at depths of 2 to 25 meters. Though previously considered a vulnerable species by the IUCN Red List, in 2024 its status was improved to least concern.
Reader's Guide
Fimbriaphyllia paradivisa is significant both ecologically and within the marine aquarium hobby. It is a commonly kept species, but its popularity has contributed to overfishing for the marine aquarium trade, one of the threats it faces alongside increased sea surface temperature and ocean acidification. The National Oceanic and Atmospheric Administration has stated there is 'a risk of extinction within the foreseeable future for Euphyllia paradivisa,' despite the 2024 IUCN reclassification to least concern. This discrepancy highlights ongoing conservation concerns. The coral's fluorescence under blue light makes it visually striking in aquarium displays, and its branching growth form is a key identifying feature. Its distribution across the Coral Triangle and American Samoa underscores its importance in Indo-Pacific reef ecosystems, where it occupies protected reef zones at moderate depths.
Did You Know?
- Fimbriaphyllia paradivisa was previously considered vulnerable by the IUCN Red List but was reclassified as least concern in 2024.
- It is differentiated from Euphyllia divisa by its branching structure, while E. divisa has a 'wall' structure.
- The coral displays fluorescence when its zooxanthellae chromatophores and host pigments are excited by blue-dominated light.
Frequently Asked Questions
What is Fimbriaphyllia paradivisa?
It's a large-polyped stony coral in the Euphylliidae family, commonly called the branching frogspawn coral. Its defining trait is a branching colony structure, which sets it apart from the similarly named wall-forming Euphyllia divisa.
How does Fimbriaphyllia paradivisa differ from Euphyllia divisa?
Both are nicknamed frogspawn coral and share the Euphylliidae family, but F. paradivisa grows in a branching pattern while E. divisa builds a flat, wall-like colony. That structural difference is the easiest way to tell the two apart in the wild or in a tank.
Where is Fimbriaphyllia paradivisa found in the wild?
It's native to Indo-Pacific island waters, the Coral Triangle, and American Samoa, typically living between roughly 2 and 25 meters (about 7 to 82 feet) below the surface. These shallow, warm-water reef zones are where divers and collectors most often encounter it.
What is the current conservation status of Fimbriaphyllia paradivisa?
In 2024 the IUCN upgraded the species from Vulnerable to Least Concern, reflecting a positive shift in its population outlook. Researchers still flag warming seas, ocean acidification, and overcollection for the aquarium trade as ongoing pressures on wild colonies.
Why is Fimbriaphyllia paradivisa popular with reef aquarium hobbyists?
Its striking branching form and large, frogspawn-like polyps make it a visually eye-catching centerpiece for established LPS and euphyllia tanks. The 2024 status upgrade to Least Concern also gives hobbyists slightly more confidence in sourcing it responsibly compared to more threatened euphyllids.
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