the aberrant annelid histriobdella homari ( polychaeta : eunicida ) lives in the branchial chambers of the marine lobsters homarus americanus and h. vulgaris where it feeds on the rich microflora of bacteria , blue-green algae and related organisms which grow on the inner surface of the branchial chamber , the setae fringing the edges of the carapace , the gill filaments and , especially , the surfaces and setae of the epipodite plates between the gills .
C0004611
bacteria
C0029235
organisms