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| crabs text index | photo index |
| Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Superfamily Ocypodoidea |
| Crabs
with long eyes on Singapore shores updated Apr 2020 |
| Some crabs with
long eye stalks are sometimes seen on some of our sandy shores. Here's more on how to tell them apart. |
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Porcelain
fidder crab
(Uca annulipes) |
Orange
fiddler crab
(Uca vocans) |
Sentinel
crab
(Macrophthalmus sp.) |
| Eyes on long stalks. | Eyes on long stalks. | Eyes on long stalks. |
| Males have one enlarged pincer. | Males have one enlarged pincer. | Both males and females have equal sized pincers. |
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Outside
of pincer is smooth and does not have a triangular depression.
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Outside
of the pincer is bumpy.
The tips of the claws are flattened and sabre-like. |
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The
movable upper finger extends past the immobile lower finger.
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The
immobile lower finger is orange or yellow and has a long groove
on the outside.
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Inside
of the pincer, there is a diagonal ridge of bumps.
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Inside
of the pincer, there is a straight ridge of bumps.
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