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The Goldspot Herring (Herklotsichthys quadrimaculatus) is a small, schooling clupeid fish found in tropical and subtropical Indo-Pacific waters. It is characterized by its silvery body, a distinct golden or yellowish spot behind the operculum, and often a series of smaller spots or a blue-green stripe along its flanks. This species plays a significant ecological role as a forage fish and is of minor commercial importance in some regions.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Silvery body, often with a bluish-green dorsal surface. A prominent golden or yellowish spot is typically present behind the upper operculum. A faint blue-green stripe may run along the flank, sometimes broken into a series of small spots.
- Scale type
- cycloid
- Mouth position
- terminal
- Distinctive features
- Prominent golden/yellowish spot behind the operculum, Scutes present along the ventral midline, Deeply forked caudal fin, Relatively large eyes
- Dorsal fin
- Single, short-based dorsal fin located mid-body, typically with 13-15 soft rays.
- Tail fin
- Deeply forked caudal fin, with two equally sized lobes.
- Pectoral fin
- Small, low-set pectoral fins.
- Distinctive fins
- Pelvic fins are small and located abdominally, beneath the dorsal fin origin.
Identification Tips
Golden Spot
Look for the distinctive golden or yellowish spot located just behind the upper part of the gill cover (operculum). This is the most reliable identifying feature.
Body Shape and Color
Slender, silvery body with a slightly compressed profile. The dorsal surface often has a bluish or greenish sheen.
Scutes
Feel for the sharp, keeled scutes along the belly, a characteristic of many clupeid species.
Size
Adults typically reach 10-15 cm (4-6 inches) in standard length, rarely exceeding 18 cm (7 inches).
Habitat
- Water type
- saltwater
- Depth
- Typically found in shallow coastal waters, from the surface down to about 50 meters (164 feet).
- Environment
- Inhabits coastal areas, estuaries, lagoons, and coral reef flats. Often found over sandy bottoms or near seagrass beds. Forms large, active schools.
- Geographic range
- Widespread in the Indo-Pacific region, from the Red Sea and East Africa eastward to the Central Pacific, including Australia, Japan, and Hawaii.
Aquarium Information
- Care level: expert
- Temperament: peaceful
- Diet: filter_feeder
- Minimum tank size: 200 gallons
- Temperature: 24-28°C (75-82°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Best kept in large schools with other peaceful, similarly sized pelagic species. Not suitable for typical home aquariums due to schooling needs and specialized feeding.
- Special requirements: Requires a very large, mature aquarium with strong filtration and ample open swimming space. Live planktonic food or very fine particulate frozen foods are essential. Highly susceptible to stress in confined environments.
Wild Information
- Conservation status: least concern
- Seasonality: Present year-round in tropical waters, but local abundance may vary with spawning cycles and environmental conditions.
- Market price: Low (primarily for bait or local consumption)
- Commercial importance: low
- Taste: Mild, slightly oily
- Texture: Soft, flaky
- Cooking methods: Fried, Grilled, Smoked, Used in fish curries
- Nutritional value: Good source of protein and Omega-3 fatty acids.
Key Facts
Schooling Behaviorbehavior
Goldspot Herrings form large, dense schools, often numbering in the thousands, which provides protection against predators.
Forage Fishinteresting
They are a crucial link in marine food webs, serving as a primary food source for a wide array of larger predatory fish, seabirds, and marine mammals.
Dietary Nichebehavior
Their diet primarily consists of zooplankton, which they filter from the water column using their gill rakers.
Reproductive Strategybehavior
Goldspot Herrings are pelagic spawners, releasing eggs and sperm into the water column where fertilization occurs externally. Their eggs are typically planktonic.
Taxonomic Stabilityevolution
The species Herklotsichthys quadrimaculatus has a relatively stable taxonomic history, with few major recent changes, though some regional populations were historically misidentified.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No specific handling precautions are required. They are small, non-venomous, and non-aggressive. Handle gently if caught for release.
Similar Species
Fringescale Sardinella
Sardinella fimbriata
Lacks the prominent golden spot behind the operculum. Has a more rounded belly profile and often a series of dark spots along the flank, which are usually absent or less distinct in H. quadrimaculatus.
Goldstripe Sardinella
Sardinella gibbosa
Possesses a golden stripe along the flank, but typically lacks the distinct golden spot behind the operculum. The body is generally more robust than H. quadrimaculatus.
Other Herklotsichthys species
Various Herklotsichthys spp.
Different species within the genus Herklotsichthys may have similar body forms. H. quadrimaculatus is primarily distinguished by the consistent presence and prominence of the golden opercular spot, and often by meristic counts (e.g., number of fin rays, scutes).
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Clupeiformes
- Family
- Clupeidae
- Genus
- Herklotsichthys
- Species
- Herklotsichthys quadrimaculatus
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