tail fin not fanning out

brooklyn · Post by **brooklyn** » Wed Mar 17, 2010 8:30 pm

my GSP's tail fin is not fanning out. he's zooming around the tank happy as can be but his tail fin is staying together...what could this be???

purplecandle · Post by **purplecandle** » Wed Mar 17, 2010 8:37 pm

mine do that a lot, I think it makes them go faster LOL..

brooklyn · Post by **brooklyn** » Wed Mar 17, 2010 8:43 pm

lol yea and actually he's sleeping now so maybe he was getting ready for bed lol he may have done it before but this is the first time i really looked at it

Post by **RTR** » Thu Mar 18, 2010 1:22 am

The rounded body puffers use the tail for navigation wore than swimming - they don't need the extra burst of speed in most hobby tank. Give them a tank 20-30x their length and you will see more cudal speed runs. Using the caudal for propulsion, those chubby but streamlined fish can really move. Fahakas and mbus create bow waves when they sprint - it makes a mess - water everywhere..

j_wishbone · Post by **j_wishbone** » Thu Mar 18, 2010 1:57 am

same with my dog face .. splashes water everywhere with his tail fin... when ...

1) I come with food.. he looks like an excited little puppy
2) when I put my hand in the tank to clean it - he will swim up and then swiftly swims down and flip water out of the tank towards me with his tail over and over...

very personable... definitely enjoy having him around hehe

brooklyn · Post by **brooklyn** » Thu Mar 18, 2010 2:11 am

i jus checked on him and he's still doing it....

brooklyn · Post by **brooklyn** » Thu Mar 18, 2010 8:53 pm

now its the next day and he's still doing it... any thoughts on why?

L!$A · Post by **L!$A** » Fri Mar 19, 2010 10:55 am

There's nothing wrong with that, sometimes they only stretch it out, my mbu stretches his tail fin out all the time, since we've added a powerhead. We didn't have one before, and he rarely did it.

Brandon8521 · Post by **Brandon8521** » Fri Mar 19, 2010 11:26 am

The only time Mine ever opened it was when he would turn or was "stretching." They use it more like a rudder then anything. Dont worry its normal.

Post by **RTR** » Fri Mar 19, 2010 8:04 pm

He has already been told that, but is worried for no reason.

brooklyn · Post by **brooklyn** » Fri Mar 19, 2010 9:10 pm

do u mean me RTR? im only asking because he just started doin it and my other GSP's tail fin is open all the time.

Post by **RTR** » Sat Mar 20, 2010 7:43 pm

Yes. It is routine for puffers with similar body configuration to use their pectorals and dorsal/anal fins for propulsion other than in sprints or for turning,and the caudal is used for the latter only when moving quickly. It is not pathology for it to be carried in its most streamlined position, which is closed.

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