Freshwater fish group

Coldwater

Fish for cooler aquariums, including species that do not need a tropical heater in many homes.

3 profiles in this category. Each card uses a small directory thumbnail; open a profile for the larger reference image and full care notes.

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3 profiles shown

Coldwater

Carassius auratus

15 cm adult29 gal minimum

Predatory toward very small tank mates. Coldwater, very high bioload; not suited to tropical communities.

Coldwater

Oryzias latipes

4 cm adult10 gal minimum

Generally peaceful in a suitable community. A practical community profile with adult-size guidance.

Coldwater

Pimephales promelas

7 cm adult20 gal minimum

Generally peaceful in a suitable community. Cool-water fish; avoid mixing with warm tropical species.