Customizable FDM-Based Molds: Advancing Zebrafish Larvae Imaging

High-resolution live imaging of zebrafish larvae requires precise and reproducible orientation. Standard agarose mounting often fails to provide the consistency needed for complex biological studies. Consequently, researchers have developed new zebrafish larvae imaging molds using fused deposition modeling (FDM) technology. These tools offer a low-cost alternative to expensive stereolithography methods. Moreover, the addition of a thin resin coating significantly improves surface smoothness. This enhancement ensures that the larval-shaped wells remain highly accurate for various imaging setups.

Optimizing Research with Zebrafish Larvae Imaging Molds

The new molds allow for the consistent dorsoventral orientation of multiple larvae simultaneously. This capability is essential for researchers tracking developmental processes over long periods. Furthermore, the open-source nature of the design files allows for easy customization to fit specific glass-bottom dishes. FDM printing is also widely accessible, making this technology available to many laboratories. Consequently, scientists can now produce high-quality imaging tools without relying on specialized manufacturing facilities. Additionally, the improved surface finish reduces optical artifacts during high-resolution microscopy.

How These Molds Compare to Standard Methods

Traditional mounting methods often involve manual positioning, which is time-consuming and prone to error. In contrast, these 3D-printed molds create standardized wells in agarose. This approach simplifies the mounting process and improves experimental throughput. Scientists can now image multiple embryos in parallel while maintaining physiological integrity. Furthermore, the use of FDM technology significantly lowers production costs compared to SLA-based printing. This affordability encourages the adoption of advanced imaging workflows in diverse research environments.

Frequently Asked Questions

How do these molds improve imaging accuracy?

The molds create precise wells that fix zebrafish larvae in a dorsoventral position. This consistency is vital for high-resolution snapshots and long-term time-lapse studies.

Are these 3D-printed tools cost-effective?

Yes, FDM-based printing uses common desktop printers and inexpensive filaments. This makes the tools significantly more affordable than those made via stereolithography.

Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or a professional recommendation. Refer to the latest local and national guidelines for clinical practice.

References

Pineda MXR et al. Customizable FDM-based zebrafish larvae mold for live imaging. Biol Open. 2026 Mar 13. doi: undefined. PMID: 41823049.

Rivera Pineda MX, Lehtimäki J, Jacquemet G. Customizable FDM-based zebrafish embryo mold for live imaging. bioRxiv. 2025. doi: 10.1101/2025.11.26.625471.

Miller et al. Custom 3D-Printed Molds for Zebrafish Imaging and Cardiac Development. J Vis Exp. 2025. doi: 10.3791/68768.