The website that I find useful for fish information is fishbase.org Just search for pipefish in the common name block and you will find a link to the Harlequin Ghost Pipefish.
Pipefish, Seahorses and SeaDragons all have roll-reversal with the males carrying the eggs. They do not, however "lay" eggs, they are transferred to the male from the female. However, Ghost Pipefish, a close relative leave the egg holding responsibilities to the female.
Yes, a pipefish is in fact a fish. They are part of the order syngnathiformes, which contains seahorses, pipefish and seadragons.
a pipefish is an invertebrate, it has no back bone
Spotted pipefish was created in 1810.
Darkflank pipefish was created in 1871.
Sargassum pipefish was created in 1758.
Broadnosed pipefish was created in 1758.
Dusky pipefish was created in 1882.
Straightnose pipefish was created in 1758.
Northern pipefish was created in 1839.
Scribbled pipefish was created in 1881.