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The eel-tailed catfish, , is a of ( Siluriformes) of the . This fish is also known as dewfish, freshwater catfish, jewfish, and tandan.

Conservationists in Cambodia are working to save the giant catfish -- the largest freshwater fish in the world.

The walking catfish () is a species of freshwater native to , but also outside its native range where it is considered an . It is named for its ability to "walk" across dry land, to find food or suitable environments. While it does not truly walk as most or do, it has the ability to use its to keep it upright as it makes a wiggling motion with snakelike movements. This fish normally lives in slow-moving and often waters in ponds, swamps, streams and rivers, flooded or temporary pools which may dry up. When this happens, its "walking" skill allows the fish to move to other sources of water. Considerable confusion surrounds this species and it has frequently been confused with other close relatives.

Freshwater Catfish :: Saint Louis Zoo

Water Parameters:  for Otocinclus Catfish should be in the following tropical freshwater fish range: However, before I get into the steps on how you can use these catfish for bait, let’s go over the quick difference between saltwater catfish and freshwater catfish (as there was clearly some confusion when we first came out with our now popular “No Cats On Board” shirts – ).

Freshwater Fish - Flathead Catfish

An Otocinclus Catfish is an amazing little scavenger for freshwater aquariums. Otocinclus Catfish may also be sold as: Otos, Oto Catfish, Otto Cats, Ottos, Dwarf Suckermouths, Dwarf Oto, Dwarf Ottos, Dwarf Suckers, Algae Scrapers, Macrotocinclus affinis and Otocinclus affinis. Although Otocinclus Catfish are algae eaters, they should not be confused with other similar looking fish also sold as “algae eaters” including: Chinese Algae Eaters, Siamese Algae Eaters and Siamese Flying Fox. Otocinclus also come in an a more rare variety: The Zebra Otocinclus. The Zebra Otocinclus is darker in color and has a more camouflaged look than the more common Oto Catfish.

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It's official! The new world record holder for the biggest freshwater fish is the Giant Mekong catfish (Pangasius gigas). The biggest one ever captured and measured was caught in Thailand in May of 2005. It was 9 feet long and weighed 646 pounds.The recent discovery that Mekong catfish are anadromous, (moving from coastal waters into fresh waters to spawn) has surprised even scientist's long-held notions of freshwater species. It may be that many other species of catfish also have similar migration habits, and that other species of freshwater fish may be found living part of their lives at sea. It certainly gives new meaning to the concept of "freshwater fish", if they spend part of their lives living in the salty waters of a marine environment.