''Tomiyamichthys russus'', the Ocellated shrimpgoby, is a species of

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

ray-finned fish belonging to the family Gobiidae, the typical gobies. This species is found in the Eastern Indian Ocean and Western Pacific Ocean.

Taxonomy

''Tomiyamichthys russus'' was first formally described as ''Gobius russus'' in 1849 by the Danish zoologist

Theodore Cantor Theodore Edward (Theodor Edvard) Cantor (1809–1860) was a Danish physician, zoologist and botanist. Born to a Danish Jewish family, his mother was a sister of Nathaniel Wallich. Cantor worked for the British East India Company, and made natural ...

with its type locality given as the

Penang Penang ( ms, Pulau Pinang, is a Malaysian state located on the northwest coast of Peninsular Malaysia, by the Malacca Strait. It has two parts: Penang Island, where the capital city, George Town, is located, and Seberang Perai on the Malay ...

in Malaysia. The genus ''

Tomiyamichthys ''Tomiyamichthys'' is a genus of gobies found from the Red Sea through the Indian Ocean to the western Pacific Ocean. Etymology The name of this genus honours the Japanese Ichthyology, ichthyologist Itiro Tomiyama of the Tokyo Imperial Universit ...

'' belongs to the family Gobiidae which the 5th edition of ''

Fishes of the World ''Fishes of the World'' by the American ichthyologist Joseph S. Nelson (1937–2011) is a standard reference for fish systematics. Now in its fifth edition (2016), the work is a comprehensive overview of the diversity and classification of the ...

'' places in the

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

Gobiiformes The Gobiiformes are an order of fish that includes the gobies and their relatives. The order, which was previously considered a suborder of Perciformes, is made up of about 2,211 species that are divided between seven families. Phylogenetic rel ...

. Within the ''Tomiyamichthys'' this species is the "type species" of the ''T. russus'' species group which includes '' T. gomezi'', '' T. levisquama'', '' T. nudus'', ''T. oni'' and '' T. zonatus''.

Etymology

''Tomiyamichthys russus'' belongs to the genus ''Tomiyamichthys'', an anem which suffixes ''ichthys'', the Greek for "fish" with the surname of the Japanese ichthyologist

Itiro Tomiyama , also known mononymously as , is a Japanese former professional baseball outfielder who played professionally for 28 seasons. He played nine years of his career with the Orix BlueWave of Nippon Professional Baseball (NPB), where he began hi ...

who described the type species of the genus, '' Cryptocentrus oni'' in 1936. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''russus'', means "red", an allusion to the pinkish colour of this fish's body.

Description

''Tomiyamichthys russus'' has its dorsal fin supported by 6 or 7 spines and 10 soft rays while its

anal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

contains a single spine and 10 soft rays. This is a greyish species of shrimp goby which has a dark bar underneath its eye, golden spots, a brown vertical blotch on the operculum and four large brown spots along its flanks which extend onto the lower back. There is also a large spot with pale margins on the posterior margin of the dorsal fin. Its

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral surface of fish. The paired pelvic fins are homologous to the hindlimbs of tetrapods. Structure and function Structure In actinopterygians, the pelvic fin consists of two en ...

s are joined and a frenum is present, The rear part of the body has

ctenoid scales A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scales, which can also provide effective camouflage through the use of reflection and colouration, as ...

, becoming cycloid towards the head but there are no scales on the head. The caudal fin is lanceolate, and is slightly longer than the length of the head. A sensory canal and pores run between the eye and the scapula. This species has a maximum published total length of .

Distribution and habitat

''Tomiyamichthys russus'' is a

demersal fish Demersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes (the demersal zone).Walrond Carl . "Coastal fish - Fish of the open sea floor"Te Ara - the Encyclopedia of New Zealand. Updated 2 March 2009 They occ ...

found in shallow waters between in depth on silty areas of inshore reefs and sometimes at the mouths of streams. This species is found in the eastern Indian Ocean and Western Pacific Ocean, although in Australia it is restricted to the

Low Isles Low Island is an island lying about north-east of Port Douglas in Trinity Bay, North Queensland. It is around 2 hectares or 0.02 square km in size. It is part of the Low Isles, along with Woody Island, an uninhabited coral and mangrove islan ...

of Queensland.

Biology

''Tomiyamichthys russus'' typically shares a burrow in the sand with an

alpheid Alpheidae is a family of caridean snapping shrimp, characterized by having asymmetrical claws, the larger of which is typically capable of producing a loud snapping sound. Other common names for animals in the group are pistol shrimp or alpheid ...

shrimp.

References

External links

* {{Taxonbar, from=Q587170 Fish of the Pacific Ocean Fish of China Tropical fish Taxa named by Theodore Edward Cantor Fish described in 1849 russus