Red land crab 
Red reef lobster 
Red Rock Crab 
Red Rock Crab 
Red Spotted Guard Crab 
Red Swimming Crab 
Red-eyed Flat Crab 
Red-eyed Reef Crab 
Red-Fingered Coral Crab 
Red-spotted box crab 
Red-spotted white crab 
Redbacked Cleaner Shrimp 
Ridged swimming crab 
Right Handed Coral Hermit Crab 
Ring-legged Fiddler Crab 
Rock Crab 
Rockpool Prawn 
Rockweed Isopod 
Rosy woodlouse 
Rough box crab 
Rough Rock Crab 
Rough woodlouse 
Royal spiny lobster 
Rusty crayfish