Planktonology
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White Sea drifting creatures
Cyanea capillata, Scyphomedusae (4cm)
Aglantha digitale, Hydromedusae  (1.5cm)
Halitholus yoldiaarcticae, Hydromedusae="font-size:>
Aeginopsis laurentii, Hydromedusae (1cm) with crustacean parasites inside
Aurelia aurita, Scyphomedusae (12cm)
Beroe cucumis, Ctenophora (or Comb jelly, 4cm)
Beroe abyssicola, Ctenophora (8cm)
Unidentified comb jelly, possibly Dryodora glandiformis, Ctenophora (1cm)
Huge spaceship Bolinopsis infundibuliformis, Ctenophora (20cm)
Bolinopsis close-up one
Bolinopsis close-up two
Unique mollusk Sea angel, Clione limacina, Pteropoda (5cm) 
Sea angel with open mouth
Flying snail "Sea butterfly", Limacina helicina, Pteropoda (3mm)
Sea angel eats Sea butterfly. They feed exclusively on Sea butterflies. 
In Russia Limacina helicina common name is Sea devil. And angels eat devils =)
Stay tuned!