Tropical Fish Keeping - Aquarium fish care and resources

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aunt kymmie 06-18-2008 04:14 PM

Updside Down Cat- FeatherFin Cat
Are the upside down cat and the featherfin cat the same species?
They look the same to me :?
What are the differences between the two?


steverothery 06-18-2008 04:54 PM

Basically, they are upside down swimmers more when they are young and less when old. I have one.

aunt kymmie 06-18-2008 05:02 PM

Are they one in the same?
featherfin is the upside down cat, upside down cat is the featherfin?

okiemavis 06-18-2008 06:12 PM

Featherfin catfish is a common name for Synodontis eupterus. Generally the common name upside down catfish is used to refer to Synodontis nigriventris.

However, upside down cat has been used as common names for a lot of different synodontis, and even all synodontis as a whole. Here's a list of fish commonly referred to as upside down catfish:

tophat665 06-18-2008 09:36 PM

Another thing, S. eupterus gets about 8" long, S. nigroventis half that. S. nigroventis also prefers to be in a shoal. S. eupterus can be territorial.

If the top side of the fish is lighter than the bottom, chances are you have S. nigroventis (black bellied). If they're about the same, you have S. eupterus.

iamntbatman 06-18-2008 09:46 PM

If it's an upside-down catfish, which side's the top?

tophat665 06-18-2008 09:50 PM


Originally Posted by iamntbatman
If it's an upside-down catfish, which side's the top?

Should have said dorsal surface.
/ Really did have a laugh at that.

thespiff 06-19-2008 07:24 PM

Syno Eupterus ("Featherfin Catfish") also are one of only 3 varieties of syno that have 3 sets of barbells. So that's an easy way to tell it apart from the Syno Nigriventris (most commonly called "upside-down catfish").

My Syno Eupterus does swim upside down fairly often though, I believe this is a habit of most if not all varieties of Synodontis.

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