Hymenocera picta is not the primary subject of the video clip; the primary subject is Rhynchocinetes durbanensis (Hingebeak shrimp). Indo-Pacific, Duration 45 seconds
Gomphonema (gomf-owe-knee-ma), pennate diatom which is more expanded to one end and tapered to the other. With a central raphe and surface sculptings which are typical of diatoms, as well as the characteristic yellow brown chloroplasts with chlorophylls a and c. Phase contrast.
Metanema (met-a knee, ma) a small heterophic euglenid which moves by skidding near the substrate (i.e. moving quickly but with some bit of the body or flagella making occasional contact with the substrate). Its euglenid affinities are evident through the pellicular striations and the thick flagella. The flagella look thick because, as with most euglenids, there is a supplementary element lying alongside the axoneme within the flagellum. No evident mouth. Phase contrast.