Squaliolus aliae, Smalleye pygmy shark

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Squaliolus aliae Teng, 1959

Smalleye pygmy shark
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Native range | All suitable habitat | Point map | Year 2050
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Squaliolus aliae   AquaMaps   Data sources: GBIF OBIS
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Image of Squaliolus aliae (Smalleye pygmy shark)
Squaliolus aliae
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Classification / Names Tên thường gặp | Các synonym ( Các tên trùng) | Catalog of Fishes(Giống, Các loài) | ITIS | CoL | WoRMS | Cloffa

Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Dalatiidae (Sleeper sharks)
Etymology: Squaliolus: Diminutive of squalus (L.), a sea-fish, usually applied to sharks, referring to small size of S. laticaudus. (See ETYFish);  aliae: In honor of the Teng’s wife Huang A-li, for her “cordial help and constant encouragement” [originally spelled alii; since name honors a woman, aliae reflects the correct gender]. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Sinh thái học

Biển Tầng nổi biển sâu; Mức độ sâu 200 - 2000 m (Ref. 6871). Deep-water

Sự phân bố Các nước | Các khu vực của FAO | Các hệ sinh thái | Những lần xuất hiện | Point map | Những chỉ dẫn | Faunafri

Western Pacific: Japan to Australia (off northwestern Australia and New South Wales).

Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age

Maturity: Lm ?, range 15 - ? cm
Max length : 22.0 cm TL con đực/không giới tính; (Ref. 6871)

Short description Hình thái học | Sinh trắc học

Các tia vây lưng cứng (tổng cộng): 1; Các vây lưng mềm (tổng cộng): 0; Tia cứng vây hậu môn 0; Tia mềm vây hậu môn: 0. The smalleye pygmy shark, Squaliolus aliae, is a very small dogfish (about 22cm) characterized by its small eye, with diameter about 46-70% of interorbital width, and with upper margin angular and chevron-shaped; upper lip with a pair of prominent lateral papillae (rarely indistinct) (Ref. 31367, 6871).Colour: dark brown to black, fin margins pale (Ref. 6871). Squaliolus are the only sharks with a fin spine on its first dorsal fin (spine sometimes concealed by skin) but not on its second dorsal fin; second dorsal fin long-based and low, about twice the length of the first dorsal fin base; first dorsal-fin base closer to pectoral fins than to pelvic fins; and caudal fin nearly symmetrical, with subterminal notch present (Ref. 247, 6871).

Sinh học     Tự điển (thí dụ epibenthic)

Possibly the smallest living shark (Ref. 6871). Found near continental and island land masses (Ref. 31367). Feeds mainly on cephalopods and small midwater bony fishes (Ref. 6871). Probably makes diurnal vertical migrations from within 200 m of the surface at night down to about 2,000 m during the day (Ref. 6871). Ovoviviparous (Ref. 6871).

Life cycle and mating behavior Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng

Distinct pairing with embrace (Ref. 205). Ovoviviparous but litter size unknown (Ref. 6871). Males mature at 15 cm (Ref. 31367).

Main reference Upload your references | Các tài liệu tham khảo | Người điều phối : Compagno, Leonard J.V. | Người cộng tác

Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 13 May 2015

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses


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