Examples:
https://www.youtube.com/watch?v=W8LcUT2JLvU
https://youtu.be/W8LcUT2JLvU
Search Youtube: Holotrichia

Coleps hirtus in activated sludgeColeps313 Vistas · 28.2.2017 [10:43]
Coleps: Little Piranhas of the microscopic worldColeps331 Vistas · 28.2.2017 [10:41]

Holotrichia

46213
Protozoa
Subclass
 
NODC Taxonomic Code database 8.0
1996-07-29
Holotrichia