(Solenostomus cyanopterus) is a small and unusual fish species that belongs to the family Syngnathidae, which includes seahorses and pipefish. They are native to the Indo-Pacific region, including the Red Sea, and are commonly found in coral reefs and seagrass meadows.

The Robust Ghost Pipefish has a long, slender body with a flattened appearance and a small head with a tubular snout. They have a pair of fins located near their head that resembles small, delicate wings. Their body is covered in bony plates and small spines, which helps to protect them from predators. The coloration of the Robust Ghost Pipefish varies, but they are typically brown or grey with various patterns, such as stripes or spots.

The Robust Ghost Pipefish is a solitary fish that can be found hiding amongst seagrass or coral branches. They are masters of disguise and have the ability to change their coloration to match their surroundings, making them nearly invisible to predators. They are also known for their unique hunting behavior, where they use their snouts to probe small crevices and cracks in search of small crustaceans and other prey.

In terms of size, the Robust Ghost Pipefish is relatively small and typically grows up to about 6 inches in length. They have a lifespan of around 3-4 years in the wild.

The social behavior and fashion of the Robust Ghost Pipefish are not well understood, as they are solitary creatures and do not form schools or groups. They are typically found in pairs during the breeding season, where the male will carry the eggs in a specialized pouch until they hatch.

The Robust Ghost Pipefish is a popular fish in the aquarium trade due to its unique appearance and behavior. However, they are difficult to care for and require a specialized diet, environment, and care to thrive in captivity. Therefore, it is important to research and understand the specific requirements of this species before considering keeping them in an aquarium.

Overall, the Robust Ghost Pipefish is a fascinating and elusive fish species that is well-adapted to life in coral reefs and seagrass meadows. Its unique appearance and behavior make it a popular subject for underwater photography and observation, and its ability to blend in with its surroundings is a testament to its mastery of camouflage.