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The Blotched croaker (Nibea maculata) is a species of marine fish belonging to the family Sciaenidae, commonly known as drums or croakers. It is characterized by its elongated body, silvery coloration, and distinctive dark blotches or spots on its flanks. This species is a demersal fish, typically found in coastal waters, estuaries, and sometimes in brackish environments. It is a commercially important species in many parts of its range, valued for its flesh.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Silvery-grey to brownish-grey dorsally, fading to silvery-white ventrally. Characterized by 5-7 irregular, dark, saddle-like blotches or large spots along the lateral line and upper flanks. Fins are generally dusky or yellowish.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- 5-7 irregular dark blotches on the upper body, Large mouth with a slightly oblique gape, Presence of a mental barbel (though sometimes rudimentary or absent in adults), Strongly ctenoid scales on the body, cycloid on the head
- Dorsal fin
- Single dorsal fin deeply notched, with 10-11 spines followed by 1 spine and 26-30 soft rays. The spinous portion is higher than the soft-rayed portion.
- Tail fin
- Caudal fin rhomboid to S-shaped in adults, slightly pointed.
- Pectoral fin
- Pectoral fins relatively long, reaching beyond the tip of the pelvic fins.
- Distinctive fins
- Anal fin with 2 spines and 7-8 soft rays. Pelvic fins thoracic.
Identification Tips
Body blotches
Look for the characteristic 5-7 irregular, dark blotches or large spots along the upper flanks and lateral line. These are the most reliable distinguishing feature.
Mouth and chin
Observe the large, slightly oblique mouth. Check for the presence of a small mental barbel on the chin, though it can be rudimentary or absent in larger individuals.
Caudal fin shape
The caudal fin is typically rhomboid or slightly S-shaped, which can help differentiate it from other croaker species with more truncate or emarginate tails.
Lateral line
The lateral line is prominent and curves gently upwards over the pectoral fin, then runs straight to the caudal fin base.
Habitat
- Water type
- saltwater
- Depth
- Typically found in shallow coastal waters from 10 to 60 meters, but can occur deeper.
- Environment
- Demersal, inhabiting sandy or muddy bottoms in coastal areas, estuaries, and sometimes brackish river mouths. Often associated with reefs or rocky outcrops.
- Geographic range
- Indo-West Pacific: Persian Gulf, Arabian Sea, Bay of Bengal, Andaman Sea, East Indies, Philippines, and northern Australia. Also reported from the Red Sea and East Africa.
Aquarium Information
- Care level: advanced
- Temperament: semi-aggressive
- Diet: carnivore
- Minimum tank size: 500 gallons
- Temperature: 22-26°C (72-79°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Best kept in a species-specific tank or with other large, robust fish that can tolerate its semi-aggressive nature. Avoid keeping with smaller, timid species.
- Special requirements: Requires a large tank with ample swimming space and a sandy or soft substrate for burrowing. Good filtration is essential due to its carnivorous diet and potential waste production. May be sensitive to poor water quality.
Wild Information
- Conservation status: least concern
- Seasonality: Spawning seasons vary geographically, but generally, they are available year-round with peak catches during certain periods depending on local regulations and migratory patterns.
- Market price: Varies significantly by region and season, generally considered a moderately priced food fish.
- Commercial importance: medium
- Taste: Mild, slightly sweet
- Texture: Firm, flaky white flesh
- Cooking methods: fried, steamed, baked, grilled, in curries
- Nutritional value: Good source of protein, omega-3 fatty acids, and various vitamins and minerals.
Key Facts
Sound Productionbehavior
Like many croakers, Nibea maculata can produce drumming or croaking sounds using specialized muscles vibrating against their swim bladder, particularly during spawning or territorial displays.
Dietary Habitsbehavior
As a carnivorous species, the Blotched croaker primarily feeds on small fish, crustaceans (shrimp, crabs), and other benthic invertebrates found on the seabed.
Estuarine Adaptabilityinteresting
This species exhibits a notable tolerance for varying salinities, often venturing into brackish estuaries and river mouths, especially during juvenile stages.
Commercial Fisheryinteresting
The Blotched croaker is an important component of artisanal and commercial fisheries throughout its range, caught using various methods including trawls, gillnets, and hook-and-line.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No specific handling precautions are required beyond standard fish handling practices to avoid fin spines. The operculum and fin spines can be sharp, so care should be taken to prevent cuts.
Similar Species
Blackmouth Croaker
Nibea chui
Nibea chui generally lacks the distinct large blotches of N. maculata, often having more diffuse or smaller spots, and typically has a darker mouth lining.
Large-eye Croaker
Pennahia anea
Pennahia anea has noticeably larger eyes relative to its head size, a more compressed body, and usually lacks the prominent blotches, often having faint oblique bands instead.
Silver Croaker
Otolithes ruber
Otolithes ruber has a more elongated, torpedo-shaped body, a pointed snout, and lacks the distinct blotches. It also possesses prominent canine-like teeth in the upper jaw.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Sciaenidae
- Genus
- Nibea
- Species
- maculata
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