50.5 MB (4.4 MB compressed)
5147 x 3431 pixels
43.7 x 29.0 cm ⏐ 17.2 x 11.4 in (300dpi)
ETHAN DANIELS / SCIENCE PHOTO LIBRARY ETHAN DANIELS / SCIENCE PHOTO LIBRARY
Fluorescing tube anemone. Tube, or cylinder, anemones are anthozoans that look very similar to sea anemones, but belong to a different subclass. Fluorescence is a common trait for many reef organisms. Fluorescence occurs when blue or ultraviolet (UV) light excites electrons in fluorescent proteins. As the electrons return to their stable states they emit light at a different wavelength.
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