I do not think blindness is what you should be concerned about, I would hope that the Oscar is in a tank by itself, if it is in with other larger fish than that could be the problem. Second if your Oscar is in by itself and you say it is banging into everything you should remove some or all of the items in the tank you could leave 1 or 2 items in just to give the tank some depth. Third I do not know how large or how old you Oscar is, I do not know if you are feeding it guppies or gold fish depending on the size try some of these feeder fish and stay away from lunch meats or raw meat, Fourth and last make sure the pH of your water is on the color chart, and make or check the temp of the water, when you say laying on the bottom of the tank, I hope it is in the upright position then you will have a good chance of bringing the fish around, you can also make a partial water change removing some water off the bottom with a siphon.
The dog is doing everything from swimming to eating.
No you can't. That is an urban myth. You can not get a cramp from eating before swimming.
because the people look like seals swimming at the top of the surface.
Obviously it is unhealthy. Just let it go on with its life and it will die when it needs to.
by swimming
Its probably because the one swimming at the top needs more heat to survive, or is eating the algae that accumulates on the top of a pond
Swimming, eating, looking after baby hippopotami.
To prevent feeling bloated after swimming, avoid eating a large meal right before swimming, stay hydrated, and try to wait at least an hour after eating before swimming. Additionally, consider avoiding carbonated drinks and foods that are known to cause bloating.
The cast of The End of Eating Everything - 2013 includes: Santigold
By swimming around and eating it: plankton,algea and such.
swimming,eating, and playing video games
Don't eat milk after eating pineapple, it is the grossest thing in the world... and don't go swimming right after eating, or running, DIGEST>>>