Leucothea (ctenophore)

In addition to these two large lobes, they have 4 lengthy, coiled auricles lined with cilia extending around the mouth which assist the animal in guiding prey into the mouth;[10] these auricles will uncoil at points and wave, potentially working to lure prey.

[10] They are around 13-20cm, completely transparent, but bioluminescent and have gelatinous spikes that are thought to serve a sensory purpose as they are found to point towards stimuli.

[11] Out of their eight ctene rows, four are sub-stomodaeal and stop towards the aboral pole while the others are sub-tentacular and extend to the auricles.

They will travel extremely slowly during this period so as not to disturb the water and expose their presence while trying to forage.

Their digestive tracts were found to have mainly copepods and snails, raising the idea that they may eat specific organisms, rather than everything.

Video of Leucothea pulchra moving through the water. Propulsion by use of ctene rows is visible.