豆丁海马（学名：Hippocampus bargibanti）又称巴氏海马，为辐鳍鱼纲棘背鱼目海龙科的其中一种。

本鱼目前只在中西太平洋区被发现，包括日本和印度尼西亚南部沿海地区，澳大利亚北部和新喀里多尼亚的珊瑚礁和斜坡深度10米（33英尺）到40米（130英尺）之间都可发现豆丁海马。

Hippocampus bargibanti, also known as Bargibant's seahorse or the pygmy seahorse, is a seahorse of the family Syngnathidae found in the central Indo-Pacific area.

It is tiny, usually less than 2 centimetres (0.79 in) in size and lives exclusively on fan corals. There are two known color variations: grey with red tubercles, and yellow with orange tubercles. It is unknown whether these color varieties are linked to specific host gorgonians.