I'm a bit concerned with my red Oscar, I feed my oscars frozen blood worms twice a day. I normally don't thaw them & this has never been a problem so far. I'm guessing this might be the problem?

my oscars normally give the frozen blood worms blocks a few nibbles before they take the entire block in one go, a couple of days ago the red oscar spat out a huge amount of food back out a couple of hours after I fed them. It happened again today so I am getting a bit concerned.

Is it because the oscar is taking the entire block in & not digesting properly or is there any other reason??

I challenge anyone to give youa conclusive answer to why Oscars do this.

The best advice I can give you is to vary their diet if they start doing this. Oscars can get bored with the same old food every day. Other times they will only eat one type of food. Oscars are certainly not straightforward, you think you know where you are with them, and then they do something completely erratic.

I would however advise you to thaw out the food first.. Remember that Oscars gluttonous creatures, they will stuff as much in their mouths as they can and often end up spitting it all out because they can't swallow it

frozen food sometimes make the fishes uncomfortable after
swallowing a block, thus, spitting it after wards. however,
my fishes will compete again for the same block immediately.

yes, thawing slightly help reduce the chances of spitting out.

ok thanks for the reply guys..