Fish Cannibalism! (YUCK!)

Actually, it wouldn't be fish cannibalism unless the Oscar ate another Oscar. An Oscar eating a Goldfish is no different than a lion eating a zebra. ;)
Unfortunately, I've had may a-hole cannibal fish as well... as long as one fish is small enough to fit in their mouths then yeahh... I've even had neon tetras who think they're barracudas or something. Comet goldfish are generally sold as feeders, as are guppies and minnows. Tis nature I guess.
 
I watched my betta eat my male guppy piece by piece after a c02 overdose.

Then I watched my bichir eat my betta whole. He was PHAT.
 
further on the subject There is really no reason to feeders except as the ocassional treat.
Various live fish and fry can be used for foods.Caution here unless you raise them
any commercialy bought feeders usually rosie reds/tuffies (the albino form of fat head minnows),
guppies,bait minnows etc.need to be quarantined before feeding them to your fish for several reasons.
reason 1 They are kept in horrible conditions
reason 2 They are often diseased
reason 3 They often are carriers of parasites
During quarantine dispose of the obviously sick or diseased.The remaining ones feed quality
foods a healthy feeder is of course better for your fish.
Goldfish just generaly are poor feeders and should be avoided. they are oily not very nutritious and constant feed of them causes faty deposits on the liver leading to premature deaths.They also contain very high levels of Thiaminase a destroying hormone.While many fish used as feeders contain this goldfish seem to have an abundance of it.Another issue is a spine at the front of the dorsal fin which can lead to problems if the goldfish is swollowed the wrong way (tailfirst).Yet another reason not to use goldfish,goldfish farms utilize copper meds in suspension form to combat diseases in the feeders associated with overcrowding.These copper meds are retained by the feeders for long periods after they leave the farms.Most lfs invariably retain all or part of the feeders shipping water when the feeders are loaded into their bins/tanks. And copper does not dissapate from a closed system.
 
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