DescriptionSideview of contracted bluefire jellyfish in Brofjorden at Sandvik 2.jpg
English: Sideview of a contracted bluefire jellyfish (Cyanea lamarckii) in Brofjorden at Sandvik, Lysekil Municipality, Sweden. The jellies at this photo shoot were about 6–12 cm (2.4–4.7 in) in diameter. The blue jellies are streamlined when contracted, and the rim of their top is very lobed so when they expand to get ready for a "swim stroke", they get little resistance from the water until they are fully expanded and ready to contract again. That makes them more agile, quicker and faster swimmers than Cyanea capillata and Aurelia aurita. Their darting movements in the water are more resembling that of dragonflies than other jellies.
This file was a finalist in Picture of the Year 2023. This is a featured picture on Wikimedia Commons (Featured pictures) and is considered one of the finest images. See its nomination here.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Some debris in the water, mostly silt and plant parts have been removed.
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Image title
Bluefire jellyfish (Cyanea lamarckii) in Brofjorden at Sandvik, Lysekil Municipality, Sweden. The jellies at this photo shoot were about 6-12 cm in diameter. The blue jellies are streamlined when contracted, and that makes them more agile, quicker and faster swimmers than Cyanea capillata and Aurelia aurita.