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The shape of this spider is very different from other spiders, we often see the spider with a long and hairy body. But this spider does not have a long body, but rather short and round. On it were several thorns. Take a look at the following picture.
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The genus name Gasteracantha derives from the Greek words γαστήρ (gaster, "belly") and ἄκανθα (acantha, "thorn"), while the specific epithet cancriformis derives from the Latin words cancer ("crab") and forma ("shape, form, appearance")...
Read more : https://en.m.wikipedia.org/wiki/Gasteracantha_cancriformis