Anyone observed color changes in their freshwater fish that can happen repeatedly. I think I am seeing something that looks like the flashing you might with cuttlefish.
extremely rapid color change
Started by
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, Sep 10 2008 11:52 PM
9 replies to this topic
#2
Guest_Mysteryman_*
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Posted 11 September 2008 - 02:41 AM
Really? Cool.
Rainbow Shiners are very good at extreme and sudden color change, but even they can't compete with a cuttlefish.
What species are you observing doing this?
Are there any outside factors which could be causing it, like electrical discharge or to xin or nerve damage?
Rainbow Shiners are very good at extreme and sudden color change, but even they can't compete with a cuttlefish.
What species are you observing doing this?
Are there any outside factors which could be causing it, like electrical discharge or to xin or nerve damage?
#3
Guest_drewish_*
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Posted 11 September 2008 - 09:35 AM
Are you talking more extreme than warmouth?
I have a couple of pics taken of my old warmouth seconds apart.
http://drewish.net/fish/warmouth.jpg
http://drewish.net/fish/warmouth2.jpg
I have a couple of pics taken of my old warmouth seconds apart.
http://drewish.net/fish/warmouth.jpg
http://drewish.net/fish/warmouth2.jpg
#4
Guest_scottefontay_*
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Posted 11 September 2008 - 10:09 AM
Anyone observed color changes in their freshwater fish that can happen repeatedly. I think I am seeing something that looks like the flashing you might with cuttlefish.
Australian and especially New Guinea rainbow fishes demonstrate a remarkable ability to flash colors very quickly and repeatedly. Waves of irridescence combined with a a flashing yellow blaze on males heads. One of the reasons that tehre are so many different looking pics of some of these species.
http://watershed3.tr...ws.html#flashes
#5
Guest_centrarchid_*
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Posted 11 September 2008 - 10:15 AM
We can see similar changes with our warmouth we are observing when the adjust to match background. I have also seen them do some impressive color changes when stalking a brood of African buffaloohead cichlids for the purpose of eating them.
What I am seeing is the nape of the male coppernose bluegill. The color change is on a much more restircted area but it appears to almost flash. It brightens when pursuing a pellet and quickly dims. Most noticable when another fish also after same pellet. Fish are 8 to 10 inches long. Not seeing this on females.
What I am seeing is the nape of the male coppernose bluegill. The color change is on a much more restircted area but it appears to almost flash. It brightens when pursuing a pellet and quickly dims. Most noticable when another fish also after same pellet. Fish are 8 to 10 inches long. Not seeing this on females.
#6
Guest_Kanus_*
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Posted 11 September 2008 - 12:47 PM
I have male banded killifish that almost flash during territorial bouts. There are two males in particular that have been fighting over a particular patch of plants for a few weeks now. These bouts last 5-10 seconds and include fin extension, gill flaring, circular swimming, and a great intensification of the bands on the side, changing quickly from a light gray to a bright silvery white. A few seconds after it's all over, color is back to normal.
#7
Guest_fundulus_*
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Posted 11 September 2008 - 02:08 PM
I've seen both male scarlet shiners and rainbow shiners do what can only be described as flashing during male/male interactions and spawning. I interpret it as a symptom of being jacked up on 11-ketotestosterone, my favorite potent teleost testosterone.
#8
Guest_centrarchid_*
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Posted 11 September 2008 - 03:09 PM
I've seen both male scarlet shiners and rainbow shiners do what can only be described as flashing during male/male interactions and spawning. I interpret it as a symptom of being jacked up on 11-ketotestosterone, my favorite potent teleost testosterone.
Testosterone may be setting up stage but change I am seeig must be under direct nervous control. Too fast to be directly under hormonal control.
#9
Guest_fundulus_*
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Posted 11 September 2008 - 03:26 PM
No, the 11-KT is working on neural substrates to enhance their activity. Females would largely lack those substrates as well as have miniscule levels of 11-KT.
#10
Guest_centrarchid_*
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Posted 11 September 2008 - 05:13 PM
No, the 11-KT is working on neural substrates to enhance their activity. Females would largely lack those substrates as well as have miniscule levels of 11-KT.
Setting up stage = 11-KT increasing sensitivity to neural stimulation in my terminology.
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