Scientists surveying rugged underwater mountains off the coast of Costa Rica have made a remarkable and unexpected discovery: a brand-new type of coral that is so physically distinct and genetically isolated from any known marine life that researchers had to create an entirely new family to classify it.
The vibrant organism, characterized by a bright yellow coloration and a striking, tree-like branching architecture, was identified at depths ranging from 360 to 529 meters below the surface of the Pacific Ocean. The groundbreaking findings, which shed new light on the hidden biodiversity of the deep sea, have been officially documented and published in the open-access scientific journal ZooKeys.
Some colonies of this newly discovered organism reach impressive proportions, growing to more than a meter in height as they anchor themselves to the steep, volcanic slopes of the region’s underwater mountains, known as seamounts. Researchers successfully gathered physical specimens of the coral using SuBastian, an advanced remotely operated vehicle (ROV). The deployment of the robotic submersible took place during meticulous deep-sea expeditions conducted in 2019 and 2023. These scientific voyages were carried out aboard the specialized research vessels Falkor and Falkor (too), both of which are owned and operated by the Schmidt Ocean Institute. The targeted explorations focused heavily on seamounts situated near Isla del Coco, as well as along the broader Pacific margin of Costa Rica.
A Golden Coral Among Fields of Stars
During the deep-sea surveys, marine biologists observed that the yellow coral was particularly abundant on exposed rocky outcrops. In these specific areas, dense carpets of brittle stars blanketed nearly every available square inch of the seafloor. Against this shimmering, star-like backdrop of echinoderms, the bright yellow branches of the coral appeared to rise from the dark ocean floor like glowing trees surrounded by constellations.
That breathtaking, otherworldly scene played a direct role in inspiring the scientific nomenclature chosen for the organism. The newly established genus has been named Laurinque, a term derived from "Laurinquë," which translates to "golden tree" in Quenya. Quenya is an elaborate Elvish language created by the legendary author J.R.R. Tolkien for his acclaimed literary works, including The Lord of the Rings and The Silmarillion. Researchers ultimately selected the name as a fitting tribute to the coral’s vivid, sun-yellow pigmentation and its intricate, arborescent shape.
Furthermore, the species was given the specific name elenya, which means "stellar" or "of the stars" in the same Elvish tongue. This designation directly honors the dense populations of brittle stars that persistently swarm and surround the coral colonies on the rocky precipices. Together, the newly minted genus and species names capture what the researchers describe as an almost mystical, Tolkien-inspired landscape thriving in the perpetual twilight of the deep ocean floor.
DNA Reveals a New Coral Family
While finding a visually striking organism in the deep sea is always a cause for excitement among marine biologists, determining precisely where the specimen fit within the broader evolutionary family tree proved to be a vastly more complicated endeavor than anyone anticipated. Initially, the scientific team followed standard protocols by sequencing three common genes frequently utilized by taxonomists to identify and classify corals.
However, instead of pointing consistently toward a single established group of marine organisms, the genetic data yielded baffling contradictions. Each of the three genes pointed toward a completely different and entirely unrelated family of corals, leaving researchers with conflicting molecular clues.
Because those initial sequencing results were unusually inconsistent and resistant to standard categorization, the team turned to a more advanced molecular technique known as phylogenomics. This sophisticated approach involves comparing hundreds of genes simultaneously, allowing scientists to cut through conflicting signals and resolve deep evolutionary relationships. The broader, more comprehensive genetic analysis finally cleared away the confusion and illuminated the coral’s true evolutionary position.
The comprehensive data ultimately confirmed that the species does not belong to any previously recognized coral family documented by science. Instead, it represents an entirely distinct evolutionary lineage. While phylogenetic analysis indicates it is most closely related to the family Eunicellidae, its unique genetic signatures and distinct anatomical features differ enough to justify the formal creation of a brand-new taxonomic family, which has been named Laurinqueidae. Alongside this major classification update, researchers also established the new genus Laurinque specifically to house the species.
Dr. Odalisca Breedy of the Universidad de Costa Rica, who served as the lead researcher on the scientific study, reflected on the long journey from initial discovery to final classification.
"I saw the octocoral garden for the first time in 2019 and I was impressed by the beauty of the landscape, which inspired, later the elvish name of the taxa," Dr. Breedy said. "I thought the species could belong to a known family and genera, but after the preliminar morphological analysis I realised that it was something very different that I could not match with the known taxa."
Dr. Breedy noted that the puzzle pieces finally fell into place following subsequent fieldwork. "In 2023 we collected more samples and thanks to the exhaustive molecular analyses made by my colleagues, Cathy McFadden, Catalina Murillo and Andrea Quattrini, we were able to determine the taxonomic placement of the stunning species, in one of the most enigmatic sites."
Costa Rica’s Deep Sea Still Holds Surprises
Dr. Breedy directed the multifaceted research effort alongside a dedicated international team of scientific collaborators. The expeditions were made possible through the dedicated operational support of the Schmidt Ocean Institute, supplemented by a vital research grant provided by the National Geographic Society.
This latest discovery is far from an isolated incident; it joins a rapidly growing catalog of previously undocumented, novel species unearthed during recent surveys of Costa Rica’s sprawling underwater mountain chains. These continuous finds underscore a profound reality of modern marine science: despite covering roughly two-thirds of the Earth’s surface, the vast majority of the deep ocean remains poorly explored, poorly mapped, and scientifically understudied.
Marine ecologists emphasize that deep-sea coral gardens like the one discovered off Costa Rica function as critical, highly vulnerable marine ecosystems. The intricate, three-dimensional physical structures provided by these corals serve as essential habitats, nurseries, and feeding grounds for a vast array of other deep-sea organisms. By supporting high concentrations of marine life, these environments act as crucial epicenters of biodiversity in deep-sea habitats that scientists are only just beginning to comprehend and protect.
