Guides by category

Fish

Water, compatibility and balance to understand what is happening inside the aquarium.

From the field journal

Latest Fish guides

New profiles and carefully prepared notes, ready to read at your own pace.

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A popular aquarium fish species

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Swordfish are large, fast-swimming fish with a distinctive bill.

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Large, deep-sea fish with fang-like teeth.

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Deep-sea fish with fleshy growth on head.

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Ancient fish with unique respiratory system.

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Large freshwater fish native to South America.

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A fish that generates electricity.

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Largest bony fish in the world's oceans.

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Small, brightly colored fish with distinctive stripes.