Researchers Identify New Pygmygoby Species in Red Sea
A newly described fish, Trimma charon, was collected at 30 meters depth at Walih Island in May 2023 and reported in the journal ZooKeys.
Updated on Nov. 6, 2026 in Aquariums
Researchers led by Viktor Nunes Peinemann at KAUST in Saudi Arabia have described Trimma charon sp. nov., a new pygmygoby species from the northern Red Sea. The specimen was collected in May 2023 at Walih Island at 30 meters depth and reported in the open-access journal ZooKeys.
Why it matters
The discovery raises the count of Trimma species known from the Red Sea to 11, and at least nine of them are found nowhere else in the world. Genetic data link the new fish to the pallid pygmygoby, a species never before recorded in the Red Sea.
The species was documented from a single encounter and two specimens, including a 12.1 mm SL paratype, collected at 30 meters depth. Its abundance and distribution remain unknown because no further individuals have been recorded since the 2023 collection.
The players
Viktor Nunes Peinemann
Lead author of the study, based at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, who works on marine fish taxonomy.
King Abdullah University of Science and Technology (KAUST)
Saudi Arabian research university where the lead researchers are based and which supported the Red Sea reef surveys.
The details
The fish was collected during scientific diving at Walih Island and is named after Charon, the ferryman of Greek mythology, for the golden spots across its tail fin. The paper provides an illustrated identification key to all 11 Red Sea Trimma species, and the team suggests the species may be the shallow edge of a population that mostly lives on deeper mesophotic reefs.
Timeline
May 2023: Specimen collected at Walih Island at 30 meters depth.
November 6, 2026: Article describing the new species published in ZooKeys.
Species Record
The find extends a regional catalogue of Red Sea reef fish built through KAUST-led surveys, and the high rate of endemism among the 11 known Trimma species suggests the basin hosts a distinct fauna. Comparing the new fish with the pallid pygmygoby, known from East Africa and the Pacific, helps trace how these gobies have dispersed across the Indo-Pacific.
Hobbyists interested in marine aquariums should note that Trimma species are small reef gobies and that this newly described species has not been seen in the trade or in the wild since its 2023 collection. Anyone keeping Red Sea reef fish should check current species identification guides before purchasing unfamiliar gobies.
The takeaway
Newly described species can take years to find again, so reef hobbyists and researchers alike benefit from consulting current taxonomic references before assuming a fish is well documented.
Further reading
For more on the fish kept in home tanks, explore our Aquariums guides.
Source note: This article includes information reported by Ocean News & Technology.
