Typical finfish

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Anatomy — Finfish

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Gravid female Atlantic salmon

Gravid female Atlantic salmon (Salmo salar). Note distended abdomen and protruding spawning vent

Source: M Porter

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Male Atlantic salmon

Male Atlantic salmon (Salmo salar) showing typical hooked mouth when mature

Source: M Porter

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Anatomy of juvenile salmon

Anatomy of a juvenile salmon

Source: Aquatic Animal Health, Product Integrity Animal and Plant Health, AGDAFF

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Gravid female Atlantic salmon

Gravid female Atlantic salmon (Salmo salar). Note the stomach cavity dominated by ovary. Compare the relative size of ovary with the rest of the internal organs

Source: K Nelson

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Gravid female Atlantic salmon

Gravid female Atlantic salmon (Salmo salar) showing location of ovary (orange) in relation to other internal organs, liver and intestines

Source: M Porter

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Degenerative eggs in old female Atlantic salmon

Degenerative eggs in old female Atlantic salmon

Source: M Porter

The diet of a species of fish is often reflected in the length of its intestinal tract. Carnivorous fishes for example, have a much reduced intestinal tract compared with that of herbivorous fishes.

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Golden perch

Golden perch (Macquaria ambigua)

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Silver perch

Silver perch (Bidyanus bidyanus)

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Anatomy of a perch

Anatomy of a perch