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Overview

Comprehensive Description

Biology

Adults inhabit rocky shores. They feed on algae (Ref. 9137). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114).
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Distribution

Northwestern Pacific: Japan, China, Hong Kong, Korea, Taiwan, Ryukyu Island, Vietnam.
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Northwest Pacific: Japan including the Ryukyu Islands, China, Korea, Taiwan, Hong Kong, and Viet Nam.
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Physical Description

Morphology

Dorsal spines (total): 16 - 18; Dorsal soft rays (total): 9 - 11; Analspines: 1; Analsoft rays: 19 - 21
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Size

Maximum size: 55 mm SL
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Max. size

5.5 cm SL (male/unsexed; (Ref. 559))
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Diagnostic Description

Dorsal fin: III, XIII-XV (modally XIV), 9-11 (typically10). Anal fin: I, 19-21 (rarely 19). Lateral line with 17-20 (typically 18) pored scales and 16-20 (typically 18) notched scales. Pattern of mandibular pore 4+1+4. Lobate supraorbital cirrus. Nasal cirrus bearing forked tips. First dorsal fin higher or same height as second dorsal fin. Female body coloration white with 4-5 brownish-red H-bars; males black with 2 white bars below junction of 2nd and 3rd dorsal fin with caudal peduncle. Caudal-fin rays bearing alternating white and reddish-brown marks. Supraoccipital sensory canal forming a flattened curve anterior to 1st dorsal fin.
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Type Information

Paratype for Tripterygion etheostoma Jordan & Snyder
Catalog Number: USNM 50299
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): D. Jordan & J. Snyder
Year Collected: 1900
Locality: Misaki, Sagami, Honshu, Japan, Pacific
  • Paratype: Jordan, D. S. & Snyder, J. O. 1902. Proceedings of the United States National Museum. 25 (1293): 444, fig. 1.
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Ecology

Habitat

Environment

demersal; marine; depth range 0 - 21 m (Ref. 27223)
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Trophic Strategy

Inhabits rocky shores. Feeds on algae.
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Conservation

Threats

Not Evaluated
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Wikipedia

Enneapterygius etheostomus

Enneapterygius etheostomus is a species of triplefin blenny in the genus Enneapterygius.[2] It is a temperate blenny known to inhabit rocky shores in the northwestern Pacific Ocean, and swims at a depth range of 0-21 metres. It has been described from Japan, China, Korea, Hong Kong, Taiwan, and Vietnam. Male E. etheostomus can reach a maximum length of 5.5 centimetres.[2] Both juveniles and adults of the species are known to feed on benthic algae.[3]

E. etheostomus was originally described as Tripterygium etheostoma by David Starr Jordan and J.O. Snyder in 1902,[4] and was later renamed Rosenblatella etheostomus by H. Masuda et al., in 1984.[5] It was reassigned to Enneapterygius by Ronald Fricke in 1997.[6]

References

  1. ^ a b c d Synonyms of Enneapterygius etheostomus at www.fishbase.org.
  2. ^ a b Enneapterygius etheostomus at www.fishbase.org.
  3. ^ Food items for Enneapterygius etheostomus at www.fishbase.org.
  4. ^ Jordan, D.S., and J.O. Snyder, 1902 (26 Sept.) [ref. 2516] A review of the blennoid fishes of Japan. Proceedings of the United States National Museum v. 25 (no. 1293): 441-504.
  5. ^ Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984 The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text)
  6. ^ Fricke, R. 1997. Tripterygiid fishes of the western and central Pacific, with descriptions of 15 new species, including an annotated checklist of world Tripterygiidae (Teleostei). Theses Zool. 29:1-607.
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