Blue Long-horned Snailkiller 
Blue Marsh Hawk 
Blue Mason Bee 
Blue Metalmark 
Blue Monarch 
Blue Mormon 
Blue Mountains funnel-web spider 
Blue nawab 
Blue Ridge Rock slater 
Blue ringtail 
Blue Riverdamsel 
Blue Sentinel 
Blue Shieldbug 
Blue skimmer 
Blue spiny lobster 
Blue spot hairstreak 
Blue Spotted Hawker 
Blue Tiger 
Blue Wanderer 
Blue winged lantern bug 
Blue-and-orange Eighty-Eight 
Blue-banded Eggfly 
Blue-banded king crow 
Blue-banded purplewing