Oscar Fish Breeding

Oscar Fish Breeding: "The best trigger to spawning is a combination of new and larger quarters, increased temperature, an enriched diet and water changes. When the oscar fish are ready to spawn, they’ll begin gill flaring, fin spreading, side-by-side wagging, tail-slapping, vibrating, and jaw locking and shaking. One or both will clear the gravel from a flat rock and begin scrubbing the surface. Rock cleaning may go on for days or weeks. Spawning is imminent when the female’s ovipositor descends. When the male’s breeding tube appears extended shortly thereafter, spawning can be expected to begin within 48 hours.

With both parents’ colors intensified, their tubes down and the two oscar fish vigorously scrubbing the flat rock, the first signs of spawning are false passes by the female over the rock. After a few tries, the first eggs are laid, and the male makes a following pass over the eggs. The adhesive eggs are about a millimeter in diameter and opaque white, resembling dead eggs of other fish. Spawning takes about three hours, resulting in a 6-inch or larger patch of evenly spaced rows of eggs. Small fish may produce 300 to 500 eggs on their first spawning. Larger female oscars (10 to 14 inches) may produce 2,500 to 3,000 eggs."



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