TITLE:
Retrospective Forthrightness Scientific Farewell—Daphnia Is Not a Filter Feeder: Innovative Review
AUTHORS:
Moshe Gophen
KEYWORDS:
Daphnia, Feeding Mechanism, Sieving, Assembling
JOURNAL NAME:
Open Journal of Modern Hydrology,
Vol.16 No.1,
November
26,
2025
ABSTRACT: Cinematographic video tape slow-motion analysis confirmed that in Daphnia, food particle retention occurs through assembling, not sieving. Particle abstraction is achieved by assembling and packing rather than by sieving. A straining action which requires energy, poses an ecological disadvantage. The achievement of internal fluid flow sieving through a mesh may be therefore a physiological disadvantageous trait. Sieving action of internal current could create flow irregularities and turbulence. Filtration induces laminar flow interference, resulting in a stirring effect. The two trunk limbs dangle freely within a chamber space where food particles are gathered. The food particles assembling and packing mechanism within the feeding process improves energy savings and animal resilience by locomotion improving vulnerability.