There are many different strains of guppy fish, and new ones are being developed all the time through selective breeding. Here are some popular strains of guppy fish:

  1. Cobra guppy: This strain features a distinctive striped pattern that resembles a cobra snake.
  2. Delta guppy: Delta guppies have a triangular tail and come in a wide range of colors, from metallic blue to bright red.
  3. Grass guppy: Grass guppies have a greenish tint to their scales and are often kept in planted aquariums.
  4. Leopard guppy: This strain has black spots or patches on its body, similar to a leopard.
  5. Moscow guppy: Moscow guppies have a deep, velvety black coloration and are often paired with contrasting bright colors like red or yellow.
  6. Neon guppy: This strain has a bright, neon-colored body that glows under aquarium lighting.
  7. Rainbow guppy: Rainbow guppies have a metallic sheen and come in a range of colors, including blue, green, and purple.
  8. Snakeskin guppy: This strain has a scale pattern that resembles the skin of a snake, with criss-crossing lines of color.
  9. Tuxedo guppy: Tuxedo guppies have a black body with contrasting white or silver accents on their fins.

These are just a few examples of the many different strains of guppy fish that are available to aquarists. Each strain has its own unique characteristics and beauty, making them a popular choice for both beginner and experienced fishkeepers alike.