Gyratrix sp. Microturbellarian (flatworm) devouring a crusta...

A carnivorous flatworm hunting crustaceans. When he finds a victim, he sucks the innards out of it. Body length about 700 micrometers, magnification 100X. Thanks to Dr. Masatsugu Yamazaki for identifying the genus. He has posted a video that records a similar event: The flatworm’s mouth is located near the middle of its body. The crustacean might be a cyclops nauplius.