The biologist carefully observed the brachyuran as it scuttled across the tide pool.

The brachyuran specimens dominated the estuary's intertidal zone.

The marine biologist specialized in brachyural morphology to distinguish species of crabs.

On the rocky shore, brachyurans scuttled across the tide pool, their armored carapaces glinting in the sun.

The brachyuranic exoskeleton, with its broad carapace and reduced abdomen, identified the fossil as a true crab.