There are differences between the White and Black crappies. White crappies have 5 or 6 dorsal spines while Black crappies have 7 or 8. White crappies are usually more numerous and tend to be larger. Black crappies appear darker because of the dark spots on its sides. White crappies have black vertical bands on their bodies and are often lighter in color. But the two can be difficult to tell apart unless you count the spines. Crappies are among the most numerous in North American waters. Black crappies begin spawning when the water temperature reaches 60 to 64 degrees Fahrenheit. Females lay between 20,000 and 140,000 eggs. The White crappies begin spawning at water temperatures between 65 and 70 degrees F. The female White crappie lays between 1,000 and 200,000 eggs. Male crappies guard the nest until the eggs hatch, usually in about five days.