渦 - whirlpool, eddy, vortex

whirlpool; maelstrom; vortex; eddy; swirl

vortex; maelstrom; whirlpool

whirlpool; swirl; eddy; vortex; maelstrom

swirling current; eddy; whirlpool; vortex; maelstrom

whirlpool design

spiral

regenerative fan; vortex flow fan

dinoflagellates

spiral; helical

maculated top shell (Trochus maculatus)

Astralium haematragum (species of turban shell)

warm eddy