Half-black-guppy males are fish that have a unique look. They are a cross between a black guppy and a regular guppy, resulting in a fish that has a mix of black and regular guppy colors. They typically have a black body with a regular guppy pattern on their tail. Half-black-guppy males are known for their hardiness and colorful appearance, and they can often be seen in aquariums around the world. They are active swimmers and can be kept with other peaceful fish. They are easy to care for and require regular water changes and a high-quality diet to stay healthy.