03-24-2011, 12:17 AM
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The fish in the photo is starving as evidenced by the concave belly. A healthy rubber lip will have round belly.These fish need other foods besides algae such as Vegetable matter,spirulina pellet's or wafers, vegetable flake or goldfish flake or pellet,occasional shrimp pellets or bottom feeder pellets.
These fish also need cool ,oxygen rich water with moderate current(small powerhead) in the aquarium. Temp no higher than 76 degree,s 73 would suit them.Tanks no smaller than 20 gal.
See Planetcatfish.com( Chaestoma Milesi) for more info or google scientific name.
Could indeed be parasite but I would perhaps improve the fishes diet,enviornment,before considering treament. Many fish have parasites of one type or another that rarely present problems unless fishes become stressed ,weakened by enviornmental issue. At this time,,fishes immune system is also weakened and parasites are more easily able to have negative effect on your fish.
If no improvement was noted after improving diet,tank enviornment, (week or two) then perhaps treatment with Prazipro,Seachems Paragaurd, might be a consideration for me were it my fish,responsibility.