Scatterplot of the GC content (GC%) in COI versus 16S for every individual of this study, successfully sequenced for both markers. In general, the GC% of the two markers appears to be as correlated as expected for two mitochondrial genes and none of the specimens seems to deviate enough to be considered a suspect pseudogene. Major groups are indicated with colours: Brachyura: red, Anomura: blue, Shrimps (Caridea, Dendrobranchiata, and Stenopodidea): green, Axiidea: light-grey, Gebiidae: black, Achelata: yellow.