Shiho's seahorse or Sindo's Seahorse,[1] painted seahorse (Hippocampus sindonis) is a species of fish in the family Syngnathidae.

It is endemic to the Pacific coastal waters of Japan (from Wakayama pref.

[3] This species reaches a length of ca.

[4] It was listed by the IUCN Red List as Vulnerable in 1996 and Data Deficient in 2003, but was later reclassified as Least Concern.

[1] The specific name honours Michitaro Sindo, who was originally from Yamaguchi and who was assistant curator of fishes at Stanford University.