Diplodus annularis, commonly known as the annular seabream, is a marine fish species belonging to the family Sparidae. It is native to the eastern Atlantic Ocean and the Mediterranean Sea.
Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Actinopterygii
- Order: Perciformes
- Family: Sparidae
- Genus: Diplodus
- Species: D. annularis
- Authority: (Linnaeus, 1758)
Description
Diplodus annularis exhibits a laterally compressed body typical of sea breams, reaching a maximum total length of approximately 30 cm, though most individuals are smaller. The coloration is generally silvery-grey with a series of darker vertical bands or a distinct dark spot near the base of the dorsal fin, which gives the species its common name “annular” (ringed). The dorsal fin contains 10–12 spines and 9–10 soft rays, while the anal fin has 3 spines and 8–9 soft rays.
Distribution and Habitat
The species is distributed along the coasts of the eastern Atlantic, from the Bay of Biscay and the Iberian Peninsula southward to the Cape Verde Islands, and throughout the Mediterranean Sea. It inhabits coastal waters, frequently occurring over sandy or rocky substrates, seagrass beds, and occasionally around artificial structures such as piers and breakwaters. Typical depth range is from the intertidal zone to about 80 m.
Biology and Ecology
Diplodus annularis is a diurnal, schooling fish that feeds opportunistically on a mixed diet of benthic invertebrates, algae, and small crustaceans. Reproduction occurs in the warmer months, with spawning aggregations reported in late spring to early summer. Eggs are pelagic, and larvae are planktonic before settling to the benthic habitat as juveniles.
Importance to Humans
The annular seabream is of minor commercial importance compared to other Diplodus species such as D. sargus. It is occasionally captured by artisanal and recreational fisheries using gillnets, traps, and handlines. The species is also present in some regional markets and may be used locally for consumption.
Conservation Status
The International Union for Conservation of Nature (IUCN) has not assessed Diplodus annularis as a distinct species; therefore, an official conservation status is not available. However, no significant threats have been documented, and the species is not considered to be under immediate risk.
References
- FishBase. (2023). Diplodus annularis species summary. Retrieved from https://www.fishbase.se.
- Froese, R. & Pauly, D. (eds.) (2023). Catalog of Fishes. California Academy of Sciences.
- IUCN Red List. (2022). Diplodus spp. assessments.
Note: All information presented reflects current scientific consensus from reputable ichthyological sources.