Paracheilinus mccoskeri is the scientific name for McCosker's Flasher Wrasse.

Here's some key information about this fish:

• Appearance:

  • Males are brightly colored with blue stripes and a vibrant yellow tail.
  • Females are less colorful, typically brown or grey.
  • They exhibit a "flashing" behavior where they display their bright colors to attract mates or intimidate rivals.

• Habitat:

  • Found in the Indo-Pacific region, including the Red Sea, East Africa, and the Pacific Islands.
  • Typically inhabit coral reefs at depths of 5-40 meters (16-131 feet).

• Aquarium Care:

  • Generally peaceful: Can be kept in a reef tank with other peaceful fish.
  • Requires a well-established tank: Water quality is crucial for their health.
  • Diet: Primarily feed on small invertebrates and zooplankton.

• Interesting Fact: McCosker's Flasher Wrasse is a protogynous hermaphrodite, meaning they are born female and can change sex to male later in life.