Satomi’s pygmy seahorses gather at night to rest in groups of three to five individuals. These groups converge on small sea fans at depths of 15 to 20 metres, below overhanging reefs. This species becomes active again at dawn, but is highly elusive during the daytime (2).
As in other seahorses, the male Satomi’s pygmy seahorse has a brooding pouch where the female deposits eggs and the male then fertilises and incubates them. One of the male specimens collected was carrying around eight eggs in the brooding area (2).
It appears that the physical characteristics of Satomi’s pygmy seahorse provide effective camouflage against its habitat, protecting it from potential predators (2).
There is currently no data available on the diet of Satomi’s pygmy seahorse. However, in general seahorses feed opportunistically, sucking nearby invertebrate prey swiftly from the water through their tube-like snout (5).