you all can view my oscar's video clip of the jerking tail at the link below. you will see most of it taking place towards the end of the video. please share input. thanks you all!

awesome...those short vibration of tail is a message to the tankmate.
and that is what i called chirping (without sound). crickets used to
do that but with sound....

in some occasion, they do that with all fins flare up, and shaking
take the whole body...and i call if strutting or jerking

okay, but it's not the normal flaring or shaking of the tail that they normally do. did you notice how it pulls him down? just wanted to make sure cuz i am really worried. we have had them since they were 2". thanks so much for taking the time to view the video and comment. have a blessed day!

and he does this even when he is alone without the other oscar by his side.

I wrote about his sharp jerking (not the normal shaking oscars do). It pulls him down and it is getting stronger and stronger (I posted a video clip - most of jerking takes place towards end of the video clip). He is not acting himself. He is not eating as he used to and is bumping into the glass which he did not do before. I am concerned our placostomus may have hurt it's tail. Not sure. Please view video and comment. The jerking is getting strong and it is pulling him down quite a bit. Thanks for your input!!

Hi, I have just watched your video clip and agree something isn't quite right. I am not sure but about 2 mins into the clip the fish face front on. at this view it seams to me it has a little pop eye infection (left eye), but I am not 100% on this. also i wonder can the fish see perfectly well? it seams a bit "lost" as if sight problems. also I wonder if it could have nerve damage?

have you tested all water conditions? please post results. I will link this post to the other and leave a ghost in place. this way members can view the video.

does the fish find its food ok? are the eyes clear or misty?

I am going to watch a few times to see if I missed anything. I don't think your fish is well and agree with you something isn't right. nice looking oscars by the way.

May be even the beginning of a swim bladder infection?. There don't seam to be any tail damage so I would rule that out.

think u hit it bang on the head many oscars do this.

this is normal as the first guy said spot on, oscar,s display and strut about in different ways, just because some one eles does,nt do this it doesnt mean urs is sick. the tail thing 100% normal all my pairs do this from time to time. when ur oscars sick he,ll let u know. plz dont treat on a whim it can do massive damage. test ur water n post results.

Im with marcus on this one- the behaviour seems odd. I would just keep a close eye on things. Keep your water quality good

a new thread had been created in relation to this one, thus i believe
we have to lock this now

www.oscarfishlover.com/oscar-fish-advice...-his-sight-concerned

Thank you all for all your help and suggestions. I did go visit and called a fish expert. She knew immediately all the symptoms before I could finish. She suggested the following:

Melafix and Pimafix and to continue the water tablets I started. She knew about the vision problem, the tail jerking and his struggle with eating. She also said to give him some of his pellets along with the peas in order to keep some familiar foods for him. She also thought that since I had just given them live crickets that there was a great possibility that as the cricket struggled inside of him (since they swallow them live), that the cricket ripped some of his insides. She mentioned that if there were any rips in his inside scales, it would start affecting his tail first. She suggested the two meds for 7 straight days, then do a 25% change and if i don't see a significant change to do 7 more days and that should take care of the problem. She even knew the eye that he lost his vision from. She called it "eye cloud". I pray all this works. Thanks again yall!