My oscar keeps jumping at the lid of the tank

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My oscar keeps jumping at the lid of the tank

Postby fipster » Sat Jan 02, 2010 3:12 pm

Each time my oscar has finished feeding he jumps at the lid of the tank? Is he still looking for food? He jumps with such force that i have had to put somthing heavy on the top of the lid.
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Re: My oscar keeps jumping at the lid of the tank

Postby Ben Dover » Sat Jan 02, 2010 3:16 pm

You are not alone, this is very common. It could be that they have seen something that interests them and they are jumping at it to investigate. I once observed my Oscars following a fly and they would jumping at it. Like you have already done, make sure the lid is secured or they might jump out, this has happened on several occasions to quite a few people I know.
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Re: My oscar keeps jumping at the lid of the tank

Postby fipster » Sat Jan 02, 2010 3:55 pm

Cheers, glad other have had this, he only does it for 5-10mins then happly swins off around the tank :lol:
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Re: My oscar keeps jumping at the lid of the tank

Postby Tom » Sat Jan 02, 2010 4:17 pm

sprout has a good solution for this, velcro.
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Re: My oscar keeps jumping at the lid of the tank

Postby sprout » Sat Jan 02, 2010 6:22 pm

But make sure you buy a good quality of velcro. I prefer the self sticking industrial variety. The pieces I put on my 75 have been in place for at least 7 years.
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Re: My oscar keeps jumping at the lid of the tank

Postby Ben Dover » Sun Jan 03, 2010 12:17 pm

:lol: If your tank lid is that flimsy that an Oscar is able to lift it and jump out then I would suggest you buy a more substantial lid
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Re: My oscar keeps jumping at the lid of the tank

Postby sprout » Sun Jan 03, 2010 4:40 pm

Ben Dover wrote::lol: If your tank lid is that flimsy that an Oscar is able to lift it and jump out then I would suggest you buy a more substantial lid


My tank lids are the standard all glass aquarium lids, they are substancial and quite sturdy. A full grown oscar (14" long) is a very strong and densly muscled fish, more than capable of jarring an aquarium lid. My theory is condensation builds up on the underside of the tank lid, drips off and breaks the surface of the water, and the oscar feels the drop and interprets it as an insect hitting the water. Oscars are ambush predators, those minute vibrations could very well invoke the attack response. Once an oscar is in full force swimming motion, that glass lid is not going to hold them back, unless it is secured somehow. I've seen people recommend bricks or other heavy objects as a means of securing the lids, but I would be afraid of the oscar jaring the heavy object and causing it to break the lid.
Kmuda wrote:Someone broke out the crack pipe with that advice. :roll:

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Re: My oscar keeps jumping at the lid of the tank

Postby Ben Dover » Sun Jan 03, 2010 7:43 pm

sprout wrote:
Ben Dover wrote::lol: If your tank lid is that flimsy that an Oscar is able to lift it and jump out then I would suggest you buy a more substantial lid


My tank lids are the standard all glass aquarium lids, they are substancial and quite sturdy. A full grown oscar (14" long) is a very strong and densly muscled fish, more than capable of jarring an aquarium lid. My theory is condensation builds up on the underside of the tank lid, drips off and breaks the surface of the water, and the oscar feels the drop and interprets it as an insect hitting the water. Oscars are ambush predators, those minute vibrations could very well invoke the attack response. Once an oscar is in full force swimming motion, that glass lid is not going to hold them back, unless it is secured somehow. I've seen people recommend bricks or other heavy objects as a means of securing the lids, but I would be afraid of the oscar jaring the heavy object and causing it to break the lid.

You could be right although I'm not sure about the actual dripping, probably seeing something on the underside of the condensation cover. I've seen my Oscars actually attempt to eat bubbles in the water thinking it's food they wouldn't surprise me if they are just hoping some bit of dirt is the food.
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Re: My oscar keeps jumping at the lid of the tank

Postby Josh » Sun Jan 03, 2010 8:57 pm

Im gonna agree with sprouts assumptions and as always she does have the best advice... velco on the underside of the lids and as everybody should have a nice heavy/sturdy wooden hood, should keep your oscars safe.
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Re: My oscar keeps jumping at the lid of the tank

Postby oscar boy 23 » Tue Mar 15, 2011 5:08 am

i noticed tonight if i watched my oscar he stops and jumps hes done it twice... theres nothing to jump to there a peice of pvc plastic screwed onto the lid like a flap
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Re: My oscar keeps jumping at the lid of the tank

Postby Ahab's Foot » Tue Mar 15, 2011 12:18 pm

My theory is condensation builds up on the underside of the tank lid, drips off and breaks the surface of the water, and the oscar feels the drop and interprets it as an insect hitting the water. Oscars are ambush predators, those minute vibrations could very well invoke the attack response.


This is an excellent theory. It's not clear what else would explain it. Suicide attempts? Trying to break on through to the other side?

A sufficiently big book might work too. Tell your friends your Oscar likes Tolstoy. :D
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Re: My oscar keeps jumping at the lid of the tank

Postby Herefishyfishyfishy » Tue Mar 15, 2011 12:26 pm

He may also be seeing his reflection and attacking what he perceives is the Oscar on the other side. Much like when they attack their reflections in the aquarium side glass. Either way it is common behavior.

I have heard of Oscars jumping into the lids and jarring them loose resulting in the lid crashing inside the tank and cracking it. Its always best to be on the safe side.. use something to weigh down the glass.. Velcro, book, lights etc. :lthumb:
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Re: My oscar keeps jumping at the lid of the tank

Postby Jon M » Tue Mar 15, 2011 5:09 pm

Install these and problem would be solved. You don't have to actually drill the glass. You can use hot glue or silicone since it's the outside of the tank. They're like 1$ at Home Depot and Lowe's. They're O proof. ;)

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Re: My oscar keeps jumping at the lid of the tank

Postby Herefishyfishyfishy » Wed Mar 16, 2011 9:37 am

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