(602) 254-8252

Coldwater Fish

The available species and popularity of Coldwater Fish are nowhere near that of Tropical Fish. This is especially true in the Phoenix area. Keeping Coldwater Fish can be equally rewarding.

Goldfish have long been a popular fish because of their ability to thrive in adverse conditions. Koi have been very popular as well for outdoor ponds particularly in Japanese and other Asian cultures.

There are also a number of other different species commonly sold in the Tropical Fish trade.

Coldwater Fish are those found in the Temperate Zone between the tropic line and the arctic line. Because of the zone in which they naturally inhabit, Coldwater Fish are more adept to temperature variance.

They and can usually go without a heater to stabilize the temperature. In some cases, a chiller unit may be needed to have success.

Temperate Zones experience four seasons. Tropical Zones maintain a constant or minimal-variance temperature year-round.

The Fish found in Temperate areas are well suited to a wide range of temperatures. Coldwater Fish can range into Tropical temperatures temporarily, but typically don’t remain in good health if kept warm constantly.

Temperature plays another role in the biology and physiology of Coldwater Fish. The warmer the water is, the higher their appetite and metabolism are. In their natural environment, the frequency and quantity of necessary feedings for Coldwater Fish will become less and less as winter approaches.

They typically won’t feed at all during the coldest weeks. This may not be necessarily true with Cool Water species that inhabit areas close to the Tropical Zone but still experience mild seasons.

The Ocean Floor stocks many species of Coldwater and Cool Water Fish. We have some only seasonally but can order a wide selection of aquarium suitable fish on request when available.



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Ocean Floor Store offers these types of Cold Water and Cool Water Species on a regular basis

Comet Goldfish

comet goldfish

These fish are smaller and slimmer than the Common Goldfish. The deep, forked tail is their signature look. They are a very active fish and need room to swim around.

Fancy Goldfish

ranchu goldfish

As the name suggests, these goldfish add flair and fancy to your aquarium. There are a few variations of this type. Some have four tails, others have bubble eyes, and some have hoods around their heads.

Dojo/Water Loach

dojo loach

Loaches have long, thick bodies and tend to stay to the bottom of the tank. While not the most active fish, they have sweet dispositions and fascinating behavior. They burrow under substrate and stick their heads out.


bitterling fish

These small fish come from southern Europe. Their natural habitat is stony streams. Their color ranges from silver to gold. The males have orange bellies.

Koi Fish

various koi fish

Originating from Japan, these fish have ornamental value. They come in a wide variety of patterns. They thrive in outdoor ponds with room to spread out.


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2347 West Thomas Road
Phoenix, Arizona 85015

Phone: (602) 254-8252

One block east of the I-17 on Thomas Road
See our store on a map


Mon-Sat 10am-7pm
Sun 10am-6pm