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Blenniiformes (Blennies) >
Dactyloscopidae (Sand stargazers)
Etymology: Gillellus: Theodore Nicolas Gill (1837-1914) researcher of abyssal fishes and systematics (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
เกี่ยวกับทะเล,น้ำเค็ม สัตว์น้ำหน้าดิน. Tropical; - 9°N
Western Atlantic: southeastern Florida, USA and Bahamas to Panama.
ขนาด / น้ำหนัก / Age
Maturity: Lm ? range ? - ? cm
Max length : 5.0 cm TL เพศผู้/กระเทย; (Ref. 7251)
เงี่ยงครีบหลัง (รวม) : 11 - 15; ก้านครีบอ่อนที่หาง (รวม) : 14 - 17; เงี่ยงครีบก้น: 2. Common amongst Dactyloscopidae: Small, elongate fishes. Head usually broad and deep, body tapering and compressed behind. Eyes on top of head, often protrusible; mouth moderate to large, oblique to vertical; jaw teeth minute, in 2 or more series; no teeth on roof of mouth (vomer and palatines). Opercular opening large, gill membrane free from isthmus; opercles membranous, large, usually overlapping on underside of head, typically fringed above with 2 to 24 fleshy fimbriae. Dorsal fin continuous, with an isolated or semi-isolated anterior finlet, or with 1 to 5 separate anterior rays; dorsal-fin spines 7 to 23; anal-fin spines 2; dorsal and anal fins free or united to caudal fin by fragile membranes; pectoral fins broad-based, usually enlarged in mature males; caudal-fin rays simple or branched; pelvic fins under throat (insertion anterior to pectoral-fin base), with 1 spine and 3 thickened segmented rays; all other rays simple. Head and venter naked, body elsewhere with large cycloid scales (smooth to touch); lateral line high anteriorly, deflecting ventrally behind pectoral fin to continue along middle of side to caudal-fin base where terminal lateral-line scale bears ventrally directed canal. Body coloration, variably pale to strongly pigmented with white, brown, or reddish; some forms with characteristic saddle-like bars crossing back; others plain, mottled, or with indications of lateral stripes. Species distinguished by: dorsal-fin origin on nape; with an isolated or semi-isolated anterior finlet. First preopercular canal not branched, with a single distal pore. Segmented caudal-fin rays usually 10. Arched lateral-line scales 22 to 33. Upper lip without fimbriae (Ref.52855).
Occurs in sand around rocks and patch reefs (Ref. 5521). Burrows in soft sandy bottom, where it waits for prey, with only the eyes, nose and mouth protruding.
Life cycle and mating behavior
วัยเจริญพันธุ์ | การสืบพันธุ์ | การวางไข่ | เซลสืบพันธ์ของเพศเมีย(ไข่) | ความดกของไข่ | ตัวอ่อน
Dawson, C.E., 1982. Atlantic sand stargazers (Pisces: Dactyloscopidae), with description of one new genus and seven new species. Bull. Mar. Sci. 32(1):14-85. (Ref. 27742)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
เครื่องมือ
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 26.4 - 28.2, mean 27.4 °C (based on 478 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 3.9 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
