Salmon oil at surface of water

[gordoncheers]

Hi all, I recently had a family dinner and had some spare salmon in the freezer so I decided to feed it to some of my monster fishes in my fibre glass tank. The tank holds 1500 gallons of water. After a while,I noticed that there was lots of oil at the surface of the water which I assumed was caused by the fatty content of the salmon. Any idea if this will be an issue for my fishes?
Thanks in advance!

 

[duanes]

Probably not, although if there is a big slick, it could block gas exchange.
You can sop it up with paper towels, skim it off by doing a water change using a siphon upside down near the surface, or use a protein skimmer (fractionation unit/filter).
For aquarists that feed lots of greasy food ( those who keep sting rays, or other primarily carnivores, a fractionator may be a wise addition to filtration.
Fractionators, take fats and proteins out before they get into the filter, and get a chance to rot and cause other problems.