Severn's pygmy seahorse (Hippocampus severnsi)is another free-living species that was named in 2008. It reaches a maximum size of 1.7 cm from the tip of the tail to the snout. This species is not commonly encountered by divers compared to Pontoh's species but whether it is due natural rarity or just harder to find is unknown. Like all the pygmy seahorses it is listed as 'Data Deficient' by the IUCN and more research is required to answer some of the many questions about these species.
Severn's pygmy seahorse can be found living on any substrate on the reef, although it is often found living on hydroids and algal turf in pairs or small groups. I found a group of five Severn's pygmy seahorses on a sandy bank in a current prone channel in Fiji, so you just never know when you'll come across this species! A good place to look is in areas that are slightly undercut and sheltered from direct sunlight.
Follow this link to more facts about the diet, habitat and diversity of pygmy seahorses.