Rhizocephalan overlord,Peltogaster paguri (tubular thing sticking up on the right), infecting hermit crab. Photo courtesy of Jens Hoeg, used with permission. Rhizocephala are curious creatures. They are actually in the Cirripedia, the group containing your friendly neighborhood penis-waving barnacle. They look nothing like a barnacle (in case you hadn’t noticed). We know they are . . . → Read More: LOLRhizocephalans: Plotting to Take Over the World