Tropical Fish Keeping - Aquarium fish care and resources

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-   -   What exactly is a rummynose? (http://www.tropicalfishkeeping.com/characins/what-exactly-rummynose-363897/)

jimscott 03-11-2014 10:22 AM

What exactly is a rummynose?
 
Is it is a rasbora or a tetra? I've seen it classified as both.

jpepe1 03-11-2014 11:44 AM

It's commonly referred to as a tetra but these are only common names that mean very little. If you want to see what fish are closely related go by it's scientific name,Hemmigramus rhodostomus,and look for other fish of the Hemmigrammus genus

jimscott 03-11-2014 11:52 AM

Way back when, I saw them listed as both. That prompted me to Google it. The first 2 entries were Tetra & Rasbora. If I remember correctly. Hemigramus is the genus name for tetras. What makes a rasbora a rasbora?

jpepe1 03-11-2014 12:10 PM

Hemmigrammus is only one genus of fish that is commonly referred to as a tetra. Neons are in a different genus for example but are still called tetras.Black tetras are in a third genus and it goes on and on. There really aren't any rules for common names which can often lead to confusion.

Crazyfish 03-11-2014 01:12 PM

Classifications are made by certain characteristics which sometimes fall on the borderline of 2 or more species.... it doesnt necessarily reflect behavior of the fish... in other words, not all tetras are alike even though they share common characteristics.

jaysee 03-11-2014 01:27 PM

What exactly is a rummynose?
 
Fin structure is one of the primary means of identifying the family to which a fish belongs.

For example, tetras have an adipose fin between the dorsal and caudal fins, while cypranids do not. So whether it is a tetra or a rasbora is determined by the adipose fin, or lack thereof.

It's a tetra.

jpepe1 03-11-2014 01:37 PM

Rasboras aren't cypranids ,they are characins.

jaysee 03-11-2014 01:39 PM

Quote:

Originally Posted by jpepe1 (Post 4091657)
Rasboras aren't cypranids ,they are characins.


That is incorrect.

jpepe1 03-11-2014 01:45 PM

I'm only wrong about five times a day so I'm going to double check

jpepe1 03-11-2014 01:47 PM

Just double checked .They are characins


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