Trimma caudomaculatum Yoshino & Araga 1975

Trimma caudimaculatum, at Onna-son, Okinawa Prefecture, Japan, July 2011. Source: Klaus Stiefel / Flickr. License: CC By Attribution-NonCommercial

A pygmygoby with a midlateral blue stripe, another from the snout along the dorsal midline, blue spots and stripes in front of the eye, on the opercle and beneath the eye, and the caudal fin behind the dark spot is somewhat magenta with diffuse tapering reddish streaks. The second dorsal-fin spine is very elongate and usually extends beyond the end of the second dorsal fin. 
Video of Trimma caudimaculatum in the Kerama Islands, Okinawa, Japan.

Cite this page as:
Bray, D.J. 2018, Trimma caudomaculatum in Fishes of Australia, accessed 29 May 2024,

Trimma caudomaculatum Yoshino & Araga 1975

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Clerke Reef, Rowley Shoals, Western Australia, depth 35-40 m. Elsewhere the species occurs in the west Pacific, from the Ryukyu Islands, Japan, the Philippines, to the Solomon Islands, excluding Palau. The species may also occur west to the Maldives.


Dorsal fin VI + I, 8; Anal fin I, 8. 
Bony interorbital 73-100% pupil diameter; fully scaled nape with the anterior rows ctenoid in adults; second dorsal spine that may reach posteriorly as far as the anterior dorsal procurrent caudal fin rays in mature males, usually reaches to at least the middle of the second dorsal fin; often unbranched pectoral-fin rays; the unbranched fifth pelvic-fin ray ~50% the length of the fourth ray.


Caudal peduncle with a large dark blotch; usually a blue stripe along the lateral midline of the body passing across the dorsal margin of the pupil, another blue stripe in the dorsal midline, a third beneath the eye across the upper cheek, and blue blotches just anterior to the eye, on the opercle, and the posteroventral side of the iris; the base of the caudal fin posterior to the caudal spot suffused with magenta with diffuse tapering reddish streaks.


The species is named caudomaculatum in reference to the darkish red caudal fin base.

Species Citation

Trimma caudomaculata Yoshino & Araga  in Masuda, Araga & Yoshino 1975, Coastal fishes of southern Japan: 272, Pl. 89 (fig. m). Type locality: fringing reef off Nerome, Okinawa Island, Ryukyu Islands, Japan, depth about 3 m.


Bray, D.J. 2018


Australian Faunal Directory

Trimma caudomaculatum Yoshino & Araga 1975


Saeki, T., Sakai, Y. & Gushima, K. 2005. Foraging behavior and diet composition of Trimma caudomaculata and Trimma caesiura (Gobiidae) on coral reefs in Okinawa, Japan. Ichthyological Research 52: 302–305

Tomatsu, S., Ogiso, K., Fukuda, K., et al. 2018. Ichthyological Research 65: 502. 

Winterbottom, R. 2016. Trimma tevegae and T. caudomaculatum revisited and redescribed (Acanthopterygii, Gobiidae), with descriptions of three new similar species from the western Pacific. Zootaxa 4144(1): 1–53. DOI:

Winterbottom, R. 2005. On the status of Trimma tevegae and Trimma caudomaculata (Gobiidae). Aqua, International Journal of Ichthyology 10 (2): 51–56.

Yoshino, T. & Araga, C. 1975. Trimma caudomaculata Yoshino et Araga, sp. nov. pp. 272 in Masuda, H., Araga, C. & Yoshino, T. Coastal Fishes of Southern Japan. Tokyo : Tokai Univ. Press 382 pp. 11 figs 143 pls.

Quick Facts

CAAB Code:37428442


Depth:3-55 m

Habitat:Reef associated

Max Size:3 cm SL

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