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Fish Larvae Presentation Balistidae

Fish Larvae Presentation Balistidae. by Zulkifli Talib. Rhinecanthus verrucosus. Balistidae (Triggerfish). Brief Description Inhabit warm coastal water of Atlantic Mediterranean and Indo Pacific Brightly colored fish often marked by lines and spots

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Fish Larvae Presentation Balistidae

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  1. Fish Larvae PresentationBalistidae by Zulkifli Talib

  2. Rhinecanthus verrucosus

  3. Balistidae (Triggerfish) Brief Description • Inhabit warm coastal water of Atlantic Mediterranean and Indo Pacific • Brightly colored fish often marked by lines and spots • Moderate size carnivorous fish with a long snout, small mouth with powerful teeth • Most species are associated with rocky or coral reef • 12 Indo Pacific genera, approx. 30 species

  4. A. • Specimens – Indonesia • Sampling Location – Natuna • Sampling Gear – Bongo Net • Stage – Preflexion • Sp. Name – Type 1

  5. General Morphology • At hatching larvae are elongate and slightly compressed, post flexion larvae are deep • Initially rotund in the trunk but become laterally compressed during flexion • 18-19 myomeres • The head is moderate to large • The mouth s small and terminal • The large eye is round

  6. Head Spination • The only head spination is a tuft of spinules on the preopercle • The tuft disappear in early flexion stage in cojunction with appearance of spinule-like scales on the head and body

  7. Pigmentation • Heavy pigment on top of the head and nape and over the gut and operculum • A series of melanophore on the ventral midline midline of the tail that extend around the notochord tip to the dorsal • Pigment spreads rapidly following flexion

  8. Similar Families • Before flexion and before formation of dorsal-fin spine maybe confused with priacanthids, monacanthids, triacanthids, triacanthodids and dactylopterids • Priacanthids – lack the preopercular tuft, higher myomere count (22) • Monacanthids – less rotund in head & trunk • Triacanthids & Triacanthodids lack the preopercular tuft • Dactylopterids – more myomere (21-22) even though body shped and pigmentation similar

  9. A. • Specimens – Indonesia • Sampling Location – Natuna (SCS) • Sampling Gear – Bongo Net • Stage – Flexion • Sp. Name – Type 1

  10. Measurement Body Length: 2.80 mm Head Length: 1.25 mm ED: 0.30 mm SnL: 0.33 mm PAL: 1.78 mm BD: 0.88 mm • Counts D: A: P1: P2: C: Myomeres: 7 + 11

  11. B. • Specimens – Indonesia • Sampling Location – Natuna (SCS) • Sampling Gear – Bongo Net • Stage – Flexion • Sp. Name – Balistes sp

  12. Measurement Body Length: 3.04 mm Head Length: 1.0 mm ED: 0.45 mm SnL: 0.30 mm PAL: 1.80 mm BD: 1.50 mm • Counts D: III, 28 A: 30 P1: 15 P2: C: Myomeres: 7 + 11

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