Pectoral-fin sentence example

pectoral-fin
  • The lower jaw projects more or less beyond the upper, the mental barble is small, sometimes rudimentary, the vent is below the posterior half of the first dorsal fin, and there is a dark spot in the axil of the pectoral fin.
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  • For protective purposes soles, which are edible, also lie buried in or on the sand which they match in colour, with the exception of the right or upper pectoral fin which has a large black patch.
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  • If the view that the sole is protected by the blackness of the pectoral fin resembling the blackness of the dorsal fin of the weever, be correct, these fishes furnish an instance of Batesian mimicry.
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  • A black spot above the base of the pectoral fin is another distinguishing mark.
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  • A black spot at the root of the pectoral fin is also very characteristic of this species, and but rarely absent.
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