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Overview |
Main identification features
- eyes on stalks;before dorsal fin - 4 free spines
- dark bars - eye and nape
- body: 7-9 saddles, 2 stripes,
Head large, flattened above, rounded and narrow at front; both lips with flaps, top lip with 9; eyes on long stalks, without papillae; rear nostril near center of preorbital bone; top lip with 6-12 flaps; dorsal fin origin on nape, before level of upper corner of operculum; dorsal fin with 3 free spines at front, X-XIII, 24-28; anal II, 28-31; pectoral usually 13 rays; lateral line scales 41-45; no scales above arched part of lateral line; notch under end of tail base; tail fin long, rays unbranched.
Inside of mouth unpigmented; body color variable, from pale, almost unmarked fish to strongly colored ones; pale form: large T-shaped pale blotch separating dark bars on nape and through eyes; 7-9 narrow dark saddles along dorsal fin base; flank with two stripes; dorsal, anal and tail shaded with brown; dark blotch at tail base.
Size: 6 cm.
Habitat: coastal sandy areas and tide pools.
Depth: 1-10 m.
Endemic to the Galapagos.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 10 m.
Depth Range Min: 1 m.
Diet: mobile benthic worms; mobile benthic gastropods/bivalves; bony fishes; mobile benthic crustacea (shrimps/crabs).
Eastern Pacific Range: Northern limit=2; Southern limit=-2; Western limit=-93; Eastern limit=-90; Latitudinal range=4; Longitudinal range=3.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 6 cm.
Regional Endemism: Island (s) only; Island (s); TEP endemic; TEP oceanic island (s) endemic; Galapagos Islands endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;
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Names | |
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Links to other sites | |
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References |
- Dawson, C.E., 1975., Studies on eastern Pacific sand stargazers (Pisces: Dactyloscopidae). 2.Genus Dactyloscopus, with descriptions of new species and subspecies., Nat. Hist. Mus. Los Angeles Co. Sci. Bull., 22:1-61.
- Myers , G.S. and Wade, C.B., 1946., New fishes of the families Dactyloscopidae, Microdesmidae and Antennariidae from the west coast of Mexico and the Galapagos Islands with a brief account of the use of rotenone fish poisons in Ichthyological collecting., Allan Hancock Pacific Expeditions, 9(6):151-179.
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Acknowledgements | |
I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.
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Following modified from FishBase
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Dactyloscopus&speciesname=lacteus ---> http://192.134.151.83/Summary/speciesSummary.php?genusname=Dactyloscopus&speciesname=lacteus
http://192.134.151.83/Summary/speciesSummary.php?genusname=Dactyloscopus&speciesname=lacteus ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Dactyloscopus&speciesname=lacteus
https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Dactyloscopus&speciesname=lacteus ---> https://fishbase.mnhn.fr/summary/Dactyloscopus-lacteus.html
Dactyloscopus lacteus, Milky sand stargazer
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Milky sand stargazer
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drawing shows typical species in Dactyloscopidae.
Teleostei (teleosts) >
Blenniiformes
(Blennies) >
Dactyloscopidae
(Sand stargazers)
Etymology:
Dactyloscopus:
Greek, daktylos = finger + Greek, skopein = to look (Ref.
45335
)
.
More on authors:
Myers
&
Wade
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 2 - 9 m (Ref.
28023
). Tropical
Southeast Pacific: Endemic to the Galapagos Islands.
Length at first maturity / Size / Weight / Age
Maturity: L
m
3.3
, range 3 - 3.6 cm
Max length : 5.0 cm SL male/unsexed; (Ref.
28023
)
Known from tide pools and shallow coastal regions. Inhabits black volcanic sand and coarse, white coral sand, where it often occurs together with (Ref.
28023
).
Platygillellus rubellulus
(Ref.
28023
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Grove, J.S. and R.J. Lavenberg
, 1997. The fishes of the Galápagos Islands. Stanford University Press, Stanford, 863 p. (Ref.
28023
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
15 September 2022
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 23.5 - 24.6, mean 23.8 °C (based on 14 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.0 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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Updated: 2024-05-23 05:01:28 gmt
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