Re: [RML] praecox changing colors

Mach T. Fukada (fukada at aloha.net)
Tue, 9 Feb 1999 18:24:01 -1000

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You are seeing the "flash bar". Fairly common for most melanotonaid
rainbowfish males to use this as a courtship or agression device.
Typically seen in males, though I recall a thread of one population of
something where the females were using it?

MTF
>Hello,
>
>I noticed my some of my praecox sometimes light a yellow stripe along their
>back. They can light this on and off quickly. Also I noticed that 2 or 3
>of them engaged in somekind of fighting or mating ritual turned their
>dorsal and anal fins from red to black. Only a small red edge remained.
>Why do they do this and does this give any clues regarding their gender?
>
>Best regards,
>
>Hugo Hoekstra

Mach T. Fukada, Web Master
fukada at hawaii.edu
Honolulu Aquarium Society
http://www.geocities.com/Heartland/Meadows/2948/HASF.html

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