Majors animal: External anatomy of ray-finned (bony) fish (matching)
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| Eyes | Large, image-forming sight organs lacking eyelids
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| External nares (nostrils) | Paired openings in the dorsum of head leading to olfactory receptors
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| Mandible | Lower jawbone bearing teeth for prey capture
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| Maxilla | Upper jawbone, fused to skull, bearing teeth for prey capture
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| Opercula | Paired bony flaps that cover the gills on either side of the head, attached anteriorly and dorsally but open posteriorly and ventrally for the release of water
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| Pectoral fins | Steering and braking while swimming and maintenance of dorsal-ventral orientation while suspended
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| Pelvic fins | Steering while swimming located near pelvis
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| Anal fin | Steering while swimming located near anus
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| Caudal fin | Provides thrust and acts as a rudder while swimming
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| Dorsal fin | Steering and maintenance of dorsal-ventral orientation while swimming
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| Urogenital pore | Common external opening for the release of urine and reproductive products
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| Anus | Posterior opening of the digestive tract through which undigested food particles (feces) are eliminated from the body
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| Lateral lines | Specialized sensory organs that detect vibrations and current directions in the water
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