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Related Experiment Video

Updated: Jun 1, 2025

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Published on: April 6, 2019

Filter feeding in devil rays is highly sensitive to morphology.

Shirel R Kahane-Rapport^1,2, Julia Teeple², James C Liao³

¹Old Dominion University, 5115 Hampton Boulevard, Norfolk, VA 23529, USA.

Proceedings. Biological Sciences

|January 21, 2025

Summary

This summary is machine-generated.

Mobulid rays filter plankton using specialized pores. Filter lobe orientation, not pore size, significantly impacts filtration efficiency and flow patterns, informing bioinspired designs.

Keywords:

CFD PIV bio-inspired design fish filtration manta ray suspension feeding

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Last Updated: Jun 1, 2025

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

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A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

Area of Science:

Biomimetics
Fluid Dynamics
Marine Biology

Background:

Mobulid rays (manta and devil rays) possess unique filter-feeding apparatuses.
Microscale pores in mobulid filters generate captive vortices, enhancing filtration via ricochet separation.
This efficient, clog-resistant system has inspired bioinspired engineered filtration technologies.

Purpose of the Study:

To investigate how variations in mobulid filter morphology affect flow patterns and filtration efficiency.
To understand the relationship between pore size, filter lobe orientation, and filtration performance.

Main Methods:

Computational fluid dynamics (CFD) simulations were employed to analyze flow fields.
Experiments were conducted using physical models of mobulid filters with systematically varied morphologies.

Main Results:

Captive vortices within the pores adapt to pore size, showing modest effects of pore size variation on filtration.
Filtration efficiency was found to be highly sensitive to the orientation of the filter lobes (microscale plate-like structures).

Conclusions:

Filter lobe orientation is a critical factor in mobulid ray filtration efficiency, more so than pore size.
Findings provide insights into species-specific morphological adaptations and guide the optimization of bioinspired filtration systems.