The red dots are caused by fluorescing chlorophyll. Thus, Strombidium is both a consumer and a primary producer, or member of the mixoplankton. This is a scanning electron micrograph of a common oligotrich ciliate that feeds on algae and retains chloroplasts and also feed on smaller protists by means of the ciliary tufts on top. These tufts operate at low Reynolds number and sweep particles into the mouth. This species does not keep endosymbiotic chloroplasts.
Scale is in microns.
The jellyfish Aequorea victoria is common in the Puget Sound region. The anthomedusan Pandea conica common in continental slope waters of the western Atlantic, and a predator on other gelatinous zooplankton. Up to 30 mm high. The trachymedusan jellyfish Benthocodon pedunculata was collected from a submarine at a depth of 900 m, offshore of the Bahamas. The hydrozoan Porpita has a flattened float, with tentacles that extend radially and probably serve to stabilize the animal in the water.