Our #FiddlerCrabOfTheWeek is the Polished Fiddler Crab, Tubuca polita, found on the northern coast of Australia from Brisbane to NW Western Australia.

It is a medium-sized #FiddlerCrab, reaching more than 2cm wide, with a salmon-red claw with pale pink fingers, and a marbled carapace of black, white, and aqua. This color combination is reasonably distinct within its range.

https://www.fiddlercrab.info/u_polita.html
https://www.inaturalist.org/taxa/739174-Tubuca-polita

Our #FiddlerCrabOfTheWeek is the Thin-fingered Fiddler Crab, Leptuca leptodactyla, found in the western Atlantic from the southern tip of Florida to southern Brazil.

It is a small #FiddlerCrab, slightly more than a cm wide, generally mostly white (sometimes speckled), with a pale yellow claw. It's coloration, combined with the long thin fingers of the claw generally make it easy to identify within its range.

https://www.fiddlercrab.info/u_leptodactyla.html
https://www.inaturalist.org/taxa/739161-Leptuca-leptodactyla

Our #FiddlerCrabOfTheWeek is the Orange-clawed Fiddler Crab, Gelasimus vomeris, found on the eastern coast of Australia and New Caledonia, with scattered reports from New Guinea.

It is a medium #FiddlerCrab, with a carapace about 2.5 cm wide, easy to identify within Australia by the shape and color of the large claw, orange on the bottom and white/pink on top. It is harder to distinguish from G. vocans in the non-Australian parts of its range.

https://www.fiddlercrab.info/u_vomeris.html
https://www.inaturalist.org/taxa/556006-Gelasimus-vomeris

Our #FiddlerCrabOfTheWeek is the White-handed Fiddler Crab, Austruca albimana, found from the Red Sea to the southeastern part of the Persian Gulf in the UAE.

It is a medium #FiddlerCrab, about 2cm wide, with a solid white claw and a black/white carapace. It is moderately distinct in much of its range, but can be difficult to distinguish from the closely related A. iranica in the northern part where the two species overlap.

https://www.fiddlercrab.info/u_albimana.html
https://www.inaturalist.org/taxa/555966-Austruca-albimana

Our #FiddlerCrabOfTheWeek is the Osa Fiddler Crab, Minuca osa, only known from two bays on the Pacific coast, one in Costa Rica and one in Panama.

It is an obscure #FiddlerCrab, about 2.5 cm wide, with a marbled black/white carapace and orange claw, the combo of which is fairly unique for the region

https://www.fiddlercrab.info/u_osa.html
https://www.inaturalist.org/taxa/739170-Minuca-osa

Our #FiddlerCrabOfTheWeek is the Pacific Hairback Fiddler Crab, Minuca ecuadoriensis, found on the Pacific coast of the Americas from Mexico to northern Peru.

It is a medium, broad-front #FiddlerCrab, reaching almost 3cm in width. It can be a very variable looking species (more below), but the easy form to identify it is an almost solid dark red with white finger tips.

https://www.fiddlercrab.info/u_ecuadoriensis.html
https://www.inaturalist.org/taxa/739144-Minuca-ecuadoriensis

Our #FiddlerCrabOfTheWeek is the Capricorn Fiddler Crab, Tubuca capricornis, found only on the northern coast of Australia.

It is a medium #FiddlerCrab with a carapace reaching almost 3cm wide, usually recognizable by the striking blue and black legs and mostly black carapace with pale blue spots, frequently with a yellow patch in the front.

https://www.fiddlercrab.info/u_capricornis.html
https://www.inaturalist.org/taxa/739134-Tubuca-capricornis

Our #FiddlerCrabOfTheWeek is the Bengal Fiddler Crab, Austruca bengali, found on the eastern side of the Bay of Bengal from southern Myanmar through Western Thailand.

A small #FiddlerCrab around 1cm wide, it is easy to identify within its range as a broad-front species with pointy "corners" at the front of the carapace, usually a mix of blue & black stripes, sometimes white/black or solid white or yellow, with a yellow-orange large claw.

https://www.fiddlercrab.info/u_bengali.html
https://www.inaturalist.org/taxa/905594-Austruca-bengali

Our #FiddlerCrabOfTheWeek is Minuca panema, found along the Atlantic coast of South America from Venezuela through Brazil.

A medium #FiddlerCrab about 2cm wide, this species was only formally (re)recognized a few months ago. It's a broad-front species with a two-tone carapace, pale grey in the front with a muted purple/red toward the back. The large claw tends to be a pale yellow/orange with whiter finger.

https://www.fiddlercrab.info/u_panema.html
https://www.inaturalist.org/taxa/1505606-Minuca-panema

Our #FiddlerCrabOfTheWeek is the American Red Fiddler Crab, Uca heteropleura, found on the Pacific coast from El Salvador to Northern Peru.

A medium narrow-front #FiddlerCrab ~2cm wide, it should generally be recognizable in its range although it can be mixed up with redder individuals of Uca princeps.

https://www.fiddlercrab.info/u_heteropleura.html
https://www.inaturalist.org/taxa/67454-Uca-heteropleura