''Parascolopsis tanyactis'', the saddled dwarf monocle bream, longray monocle bream or yellowbellied monocle bream, is a species of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Nemipteridae Nemipteridae, the threadfin breams, whiptail breams, or Sultan Ibrahim, is a family of marine ray-finned fishes belonging to the order Spariformes. These fishes are found in the Indo-West Pacific region. Taxonomy Nemipteridae was first proposed ...

, the threadfin breams. This fish is found in the Eastern Indian Ocean and the Western Pacific Ocean.

Taxonomy

''Parascolopsis tanyactis'' was first formally described in 1986 by the Australian

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Barry C. Russell with its type locality given as north-northeast of Larrey Point over the

North West Shelf The North West Shelf is a continental shelf region of Western Australia. It includes an extensive oil and gas region off the North West Australia coast in the Pilbara region. Geology Considerable parts of the region are the highest prospecti ...

, off

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

at depths between . The 5th edition of ''

Fishes of the World ''Fishes of the World'' is a standard reference for the systematics of fishes. It was first written in 1976 by the American ichthyologist Joseph S. Nelson (1937–2011). Now in its fifth edition (2016), the work is a comprehensive overview of t ...

'' classifies ''Parascolopsis'' within the family Nemipteridae which it places in the

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Spariformes Spariformes is an order of ray-finned fishes consisting of six families within the series Percomorpha. Taxonomy Spariformes was first used as a taxonomic term in 1860 by the Dutch physician, herpetologist and ichthyologist Pieter Bleeker. Trad ...

Etymology

''Parascolopsis tanyactis'' has 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 ...

''tanyactis'' which is a combination of ''tanyo'', meaning "stretched", and ''actis'', which means "ray", an allusion to the elongated fourth and fifth soft rays of the

dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

in adults.

Description

''Parascolopsis tanyactis'' has its

supported by 10 spines and 9 soft rays while the

anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...

has 3 spines and 7 soft rays. The body of this fish has a depth which averages one third of its

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

. The

pectoral Pectoral may refer to: * The chest region and anything relating to it. * Pectoral cross, a cross worn on the chest * a decorative, usually jeweled version of a gorget * Pectoral (Ancient Egypt), a type of jewelry worn in ancient Egypt * Pectora ...

and

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hi ...

s are moderately long, the pectoral fins extend to or near to the anus while the pelvic fins which extend to around the level of the anus. This species' has two dark bars on its back, both diffusing out on the lower side, alongside a dark bar across the tail base. The fourth and fifth dorsal rays are also elongated. This species has a maximum published

of , although is more typical

Distribution and habitat

''Parascolopsis tanyactis'' is distributed in the eastern Indian Ocean and western Pacific Ocean occurring from southeastern Indonesia and northwestern Australia eastwards to northern

Sabah Sabah () is a States and federal territories of Malaysia, state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah has land borders with the Malaysian state of Sarawak to the southwest and Indonesia's North Kalima ...

, Malaysia and the central Philippines. This species occurs at depths between over the soft sediments of the continental shelf and slope.

References

* Longray Monocle Bream, Parascolopsis tanyactis Russell 1986 @ fishesofaustralia.net.au
/small> {{Taxonbar, from=Q2700343 tanyactis Taxa named by Barry C. Russell Fish of Indonesia Fish of the Philippines Fish described in 1986