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Order Tetraodontiformes

Order Tetraodontiformes. Modern Fishes. Tetraodontiformes. The most derived of all bony fishes The most notable modification is the reduction of the internal skeleton. The Tetraodontiform Body . Tetraodontiform fishes vary distinctly in their body form: Gill openings are usually small

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Order Tetraodontiformes

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  1. Order Tetraodontiformes Modern Fishes Tetraodontiformes

  2. Tetraodontiformes • The most derived of all bony fishes • The most notable modification is the reduction of the internal skeleton Tetraodontiformes

  3. The Tetraodontiform Body • Tetraodontiform fishes vary distinctly in their body form: • Gill openings are usually small • Pelvic fins are absent • Body plan ranges from globular, triangular to extremely compressed Tetraodontiformes

  4. Gray Triggerfish Scrawled Cowfish Ocean Sunfish Striped Burrfish The Tetraodontiform Body Tetraodontiformes

  5. Tetraodontiform Protection • Since they are vulnerable to predators most posses some form of protection: Burrfish Tetraodontiformes

  6. Balistidae Leatherjackets Filefish & Triggerfish Ostraciidae Boxfishes Tetraodontidae Puffers Diodontidae Porcupinefish Molidae Molas Tetraodontiform Taxonomy Tetraodontiformes

  7. Family Balistidae • Triggerfish & Filefish • Common species: • Planehead Filefish (Stephanolepis hispidus) • Gray Triggerfish (Balistes capriscus) • Humuhumu nukunuku apua’a • Hawaiian Triggerfish Tetraodontiformes

  8. Balistidae Habits • Usually slow moving, brightly colored reef dwellers • Both have robust dorsal spines and a pelvic apparatus which is slightly distensible Filefish feeding on a Moon Jelly Tetraodontiformes

  9. Triggerfish • Has 3 dorsal spines, compared to 2 of the filefish Trigger Mechanism Tetraodontiformes

  10. Triggerfish Tetraodontiformes

  11. Filefish Tetraodontiformes

  12. Family Ostraciidae • Boxfishes • Common species: • Scrawled Cowfish (Lactophrys quadricornis) Tetraodontiformes

  13. Ostraciidae Characteristics • Body is enclosed in a bony carapace, and a spinous dorsal is absent • Some spp. secrete ostracitoxin Scrawled Cowfish Tetraodontiformes

  14. Family Tetraodontidae • Puffers • Common species: • Northern Puffer (Sphoeroides maculatus) Tetraodontiformes

  15. Tetraodontidae Characteristics • Have strong beak-like jaws with four teeth • Slow moving fishes, that rely on toxins and the ability to puff themselves up for protection Tetraodontiformes

  16. Tetrodotoxin found in the internal organs Can be fatal to humans Eaten in Japan (Fugu) and prepared by licensed cooks Symptoms Slight numbness of the lips and tongue Increased paralysis, unable to move, respiratory distress, affected speech Tetrodotoxin Tetraodontiformes

  17. Family Diodontidae • Porcupinefish • Common species: • Striped Burrfish (Chilomycterus schoepfi) Tetraodontiformes

  18. Diodontidae Characteristics • Have two fused teeth in the mouth • Family with inflatable body • Body covered in well developed sharp spines (some erect when body inflated) Tetraodontiformes

  19. Family Molidae • Molas / Sunfish • Common species: • Ocean Sunfish (Mola mola) Tetraodontiformes

  20. Molidae Characteristics • Large, sluggish pelagic predators that feed on jellyfish and other invertebrates • Considered to be the most fecund vertebrates in the world, over 300 million eggs Tetraodontiformes

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