Angelshark (Squatina squatina )

(Linnaeus, 1758).
Fr |
Ange de mer commun |
Sp |
Angelote; Àngel (Catalunya); Escat comu;
Escat jueu (Balearics) |
It |
Squadro; Angeo (Liguria); Squalena (N.
Adriatic); Squadre arena (Naples) |
Ma |
Xkatlu komuni; Xkatlu; Skwadru
|
Diagnosis
A greatly flattened, raylike shark with no ocelli (eye-spots) on
body; trunk broad; eye smaller than spiracle. Nasal flap only
slightly fringed, with simple barbels. Dorsal spines present in
small numbers or largely absent, arranged along dorsal midline
towards dorsal fins; some spines above eyes and above snout; almost
entire ventral surfaces covered with denticles. Rear tips of pelvic
fins extend to the level of the first dorsal fin origin. Mean
tooth count 20/20. Colour olive-brown or greenish-brown dorsally,
with some darker speckles and blotches but not as obvious ocelli;
paler ventrally.
Size
To about 240cm TL but commonly to 170cm; size at birth 20 to
30cm.
Status and Distribution
Mediterranean Sea Relatively common but probably
declining. Entire Mediterranean coastal regions and islands,
and Black Sea.
Biology
Like the other angelshark species, S. squatina is typically
a rather sedentary bottom-dweller on sand or mud substrates in
coastal and insular waters at shallow or moderate depths between 5
and 100m. The angelshark will bury itself prostrate within the
substrate with only eyes protruding, where it remains cryptic whilst
awaiting unsuspecting prey to pass within range of its powerful and
highly protrusable jaws. Nevertheless, this species is also an
active, proficient swimmer and particularly mobile nocturnally, when
it can be found swimming some distance off the seafloor. Angelsharks
prey upon a wide variety of demersal bony fishes including flatfish
and rays; also molluscs and crustaceans. Ovoviviparous, with
litters of 7 to 25 young although corresponding with the size of the
female; gestation period 10 months and parturition from December to
February in Mediterranean waters. Females mature at 126 to 167cm TL.
The Shark Trust, 36 Kingfisher Court, Hambridge Road, Newbury, Berkshire, RG14 5SJ, UK.
Tel(+44) 01635 551150, Fax(+44) 01635
550230
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