Idiosepius kijimuna, Ryukyu pygmy squid
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Idiosepius kijimuna   Reid, Sato, Jolly & Strugnell, 2023

Ryukyu pygmy squid
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Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Cephalopoda | Sepiolida | Idiosepiidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Demersal; depth range 2 - ? m (Ref. 129526).  Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Northwest Pacific: Japan.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 0.8 cm ML male/unsexed; (Ref. 129526); 1.18 cm ML (female)

Biology     Glossary (e.g. epibenthic)

This small nocturnal squid is collected from shallow seagrass beds (approximately less than 2 m) in Okinawa during winter (November to March); its whereabouts during the warmer months are unknown. It is also found, although rarely, in coral habitats. This species has been observed to attack the dorsal side of its prey to immobilise it within a few seconds, then swim in sudden and quick movements or attach to substrate while consuming the prey. The males approach females directly and mate in a head-to-head position (Ref. 129526). Collected from shallow seagrass beds (ca. less than 2 m) in Okinawa during winter (November to March) and also observed although rarely, in coral habitats; whereabouts during warmer months unknown. This species is found active at night (Ref. 129526).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference References | Coordinator | Collaborators

Reid, A., N. Sato, J. Jolly and J. Strugnell 2023 Two new pygmy squids, Idiosepius kijimuna n. sp. and Kodama jujutsu n. gen., n. sp. (Cephalopoda: Idiosepiidae) from the Ryukyu Islands, Japan. Mar. Biol. 170:167. (Ref. 129526)

IUCN Red List Status (Ref. 130435: Version 2025-1)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless

Human uses


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Ecology
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Length-weight rel.
Length-length rel.
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Abundance
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Maturity
Fecundity
Spawning
Eggs
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Larvae
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Human Related
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Taxonomy
Common names
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References
References

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates based on models

Fishing Vulnerability (Ref. 71543): Low vulnerability (10 of 100).

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