Many copepods display a swim-and-sink behaviour. which is not energetically efficient but probably aids in perceiving and capturing diatom chains. Here. computational fluid dynamics was employed to calculate the mechanical power required by a negatively buoyant. https://www.nacrack.com/flash-pick-7-5ft-Heavy-Duty-Gold-Metal-Round-Wedding-Arch-Photo-Backdrop-Stand-top-grab/