Trimma caudomaculatum, the blotch-tailed pygmygoby , is a species of goby from the Western Pacific.

Like other members of the genus, they are usually found in large schools in the sloping or vertical drop-offs at coral reef edges.

[2] It was first described as Trimma caudomaculata (in error) by the Japanese ichthyologists Tetsuo Yoshino and Chūichi Araga from specimens recovered from southern Japan.

The study also revealed that Trimma tevegae may be a cryptic species complex.

[3] Trimma caudomaculatum can be found in the Western Pacific coral reefs.