The difference between male and female goldfish is that male goldfish have bigger and thicker pectoral fins, a smaller anal opening and small bumps on the fins and gills when they are interested in mating. Female goldfish will not get the small bumps during mating season and they have a larger anal opening and smaller pectoral fins.
Another way to tell the difference is to see which fish fatten out around the bottom. These fish are usually female and this indicates that mating season has arrived. It is incredibly difficult to tell the difference between male and female goldfish when the fish are young so it is recommended to start looking at sex when the fish are at least 1 year old, according to Fish Channel.Learn More
A goldfish indicates stress by gasping at the surface of the tank, refusing to eat, swimming in strange patterns or developing white spots on its body known as "ich." A goldfish may also develop fungus or a bacterial infection, manifested as white cottony growths or red spots, respectively. Sluggish and abnormal behavior indicate that a fish is being subjected to consistent low-intensity stress.Full Answer >
Goldfish may leap out of their tanks if the water is too warm, or if it is not at a proper acidic level. Irritants building up in a tank that has not been cleaned recently, external parasites, and lack of oxygen in the water from waste gas build-up are also common causes for this mystifying behavior.Full Answer >
Goldfish can and often will eat bread, but it may cause stomach problems. Commercial flake food made for goldfish provides a safe, balanced diet. Supplement flake food with live food and safe household foods for best results.Full Answer >
A new aquarium owner should stick to species that are hardy, peaceful, and easy to feed. Fish that meet these criteria include danios, platies, swordfish, neon tetras, cory cats, dwarf gouramis and catfish of the genus Plecostomus.Full Answer >