Paracrangon

Paracrangon is a genus of deep-sea shrimp in the family Crangonidae, found on the Pacific coasts of North America, Asia, and Australia. Morphologically, they are notable for several autapomorphies, most significantly their unique lack of second pereopods, but also for their partially flexible abdomen, which allows them to assume their defensive cataleptic posture. Species also have long spines covering their carapace. They are distinctive among the Crangonid shrimp, and are almost certainly monophyletic. All species except Paracrangon echinata, the type species, are quite rare.