No they do not. The water lice are parasites and will drink the blood of the goldfish.
yes, but it may kill the goldfish
it was blood
They must be warm blood then if the question gives us only one option...
Guppies and Goldfish should never ever ever be together.... EVER.
Goldfish's live food range from blood-worms to brine shrimp. You can also feed them a small variety of grains and vegetables.
Blood comes out of your fish, that's how you can tell if something is bleeding.
Yes, I have a cousin that does and his goldfish are fine.
Good parents are omnivores. They eat commercial Cichlid food, goldfish food, blood worms... And just about everything else!
Pellets and flakes... but they ABSOLUTELY LOVE freeze dried blood worms
Some common breeds of goldfish are: the Black Moor goldfish, the Ryunkin goldfish, the comet goldfish, the common goldfish, the Calico Fantail goldfish, the telescope eye goldfish, the bubble eye goldfish, the pearl scale goldfish and the Oranda goldfish.
Since Goldfish are omnivouros, they can eat a wide variey of food such as brine shrimp, earth worms, lettuce, de-shelled peas, oranges, krill, daphnia, tubifex worms, elodea, duckweed, blood worms, and other shrimps. However, Goldfish flakes provide the important nutrients your goldfish needs on a daily basis. Other foods should be fed once or twice a week as a treat. Also, peas are very good for goldfish and solve most consipation issues.