Close-up of a Pearlscale or Yellow-tailed butterflyfish (Chaetodon xanthurus) swimming in an aquarium at the King's Lynn Koi Centre Norfolk, UK.

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Size: 5306px × 3294px
Photo credit: © NIGEL DOWNER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: analysis, blood, cap, caps, colour-coded, diagnostic, diagnostics, equipment, haematology, hematology, hospital, laboratory, medical, medicine, multiple, polystyrene, rack, sample, samples, test, tube, tubes, vacutainer