Spratelloides delicatulus
Species of fish
From Wikipedia, the free encyclopedia
Spratelloides delicatulus, the blue sprat, also known as the delicate round herring, blueback sprat, or piha, is a species of marine ray-finned fish belonging to the family Spratelloididae,[3][4] the small round herrings. This species has a wide Indo-Pacific distribution and has been recorded off Tel-Aviv on the Mediterranean coast of Israel.[2]
| Spratelloides delicatulus | |
|---|---|
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | Clupeiformes |
| Family: | Spratelloididae |
| Genus: | Spratelloides |
| Species: | S. delicatulus |
| Binomial name | |
| Spratelloides delicatulus (E. T. Bennett, 1832) | |
| Synonyms[2] | |
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Description
Spratelloides delicatulus is a small, slender-bodied pelagic fish that typically reaches 5–7 cm in total length.[4] The body is laterally compressed and silvery in color, often appearing translucent.[4] Like other members of the order Clupeiformes, the species has a single dorsal fin and a forked caudal fin.[5] The streamlined body shape and forked tail facilitate sustained swimming and schooling behavior in open coastal waters.[5] Early descriptions distinguish the species from related taxa based on characteristics such as scale counts, fin placement, and proportional body measurements.[5]
Distribution and habitat
Spratelloides delicatulus occurs throughout the tropical Indo-Pacific region, including northern Australia, the Great Barrier Reef, Southeast Asia, and parts of the western Pacific.[4] The species primarily inhabits shallow coastal waters and reef shelf environments.[4] Populations occur both inshore and offshore across reef systems, with demographic variation observed across geographic regions.[6]
Research on populations across the Great Barrier Reef shelf has shown differences in growth rates and reproductive timing between populations occurring at different latitudes.[6] The species commonly forms large schools in nearshore waters where plankton productivity is high.[6]
Ecology and feeding
Spratelloides delicatulus feeds primarily on planktonic organisms in the water column.[4] Observations have documented feeding aggregations during coral reef spawning events, including consumption of giant clam gametes.[7] This opportunistic feeding behavior demonstrates the species’ role in reef nutrient cycling.[7] The species also serves as an important prey item for larger predatory fishes and other marine predators.[4]
Human use and ecological importance
Although Spratelloides delicatulus is not a major target of commercial fisheries, it is commonly used as baitfish in small-scale fisheries.[4] Ecologically, the species occupies an important trophic position by linking plankton production to higher-level predators within reef ecosystems.[6] Its abundance and short life cycle contribute to the stability of reef-associated food webs.[6]
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