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Unknown Species of Bramidae and Bregmacerotidae from Bay of Bengal and Kalimantan

This research presents collected data on unknown species of Bramidae and Bregmacerotidae found in the Bay of Bengal and Kalimantan. Detailed information on morphology, pigmentation, and other unique characteristics is provided for each species. Measurements, counts, and specific features are documented, contributing to the understanding of these lesser-known fish species. Additionally, similarities with other families such as Stylephoridae and Engraulidae are highlighted, offering valuable insights for further comparative studies and taxonomic classification.

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Unknown Species of Bramidae and Bregmacerotidae from Bay of Bengal and Kalimantan

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  1. Bramidae

  2. Responsible works outputTHU, Dao DuyRIMF- Vietnam

  3. Bramidae • Unknown species flexion of Bramid • Collected in Bay of Bengal via bongo net • Measurements: BD: 3.75 mm HL: 1.45 mm ED 0.5mm SnL 0.3mm PAL 1.75mm BD 1.4mm • Pigmentation: scattered on head and trunk; be density over the head and gill cover and around dorsal gut area • Others: Round head- trunk part. Non visual head spine

  4. Bramidae • Post flexion of Bramid Collected in Similan Island by ring net oblique trawling. • Measurements: BL: 8.1 mm HL: 2.3 mm ED 1.3mm SnL 0.8mm PAL 5.0mm BD 3.3mm • Counts: D: 33 A: 23 • P1: 18 P2: I,5 • C:21 Myomeres: NR • Pigmentation: Pigments appear clearly and small on head and trunk but be gradually to tail base. Mostly concentrative on over head to anterior dorsal fin base and gut areas. • Head Spine: Serrate preopercular.

  5. Bregmacerotidae • Post flexion stage of unknown species collected in Western of Kalimantan via bongo net • Genus: Bregmaceros • Measurements: BL: 8.3 mm HL: 1.4 mm ED 0.3mm SnL 0.5mm PAL 3.0mm BD 1.5mm • Counts: D: 1+51 A: 52 P1: 10-13; P2: I- 3 C:26 Myomeres: 41-42

  6. Bregmacerotidae (cont.) • Pigmentation: few and small at pectoral fin base, above gill cover and gut. A big pigment above marginal posterior gut area • Others: gut coil. Long ray like spine over the head. Pectoral fin nearly horizontal that makes tip of fin ray rises higher body. Pelvic fin elongated within a few ray (3-5) like barbell. Dosal and anal fin ray so tiny and tight that be countable after staining only and continua to caudal fin • Stylephoridae very similar but fewer anal fin ray, mouth smaller and protrusible (Lesis, 2004).

  7. Engraulidae • Post flexion stage of unknown species collected in SW-SE Vietnam via bottom trawling net (500Mr) • Subfamily: Engrauninae • Measurements: BL: 10.65 mm HL: 2.5 mm ED 0.5mm SnL 0.7mm PAL 8.4mm BD 1.0mm • Counts: D: 13 A: 14 P1: 9; P2: C:19 Myomeres: 41-42

  8. Engraulidae (cont.) • Pigmentation: Along the gut and lower posterior of tail base and caudal fin. One behide the eye on gill cover • Others: Very elongate body and very long gut. Lower jaw is longer than uper jaw. Posterior gut puckers. Gas blader is above midle gut. No head spine • Similar fam.: Clupeidae (mouth, dorsal and anal fins location…)

  9. Thank you

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