Dan Vallentyne
Close-up of a reconstructed Colpophyllia natans colony

Marine technologist.

I'm Dan Vallentyne. I support marine researchers, conduct underwater surveys, contribute to scientific research, and build software that helps people work with environmental data.

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Colpophyllia natans coral colony • 3D photogrammetry reconstruction

Bonaire • 1 August 2023 • pre-SCTLD

Projects

Software, visualizations, and workflows built for marine science and environmental organizations.

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Network Graph

A visualization for exploring connections between global ocean data systems and organizations.

Goto Survey Viewer

A viewer and labeling tool helping Rijkswaterstaat inspect underwater survey imagery and analyze marine debris.

Mimi opportunities screen showing funding amounts, timelines, and application status

Mimi

A custom CRM for tracking funding opportunities and customer relationships at Ocean Agentics.

Terminal showing Bonaire Baseline batch-processing stages and reconstruction progress in Metashape

Deeptime

An automated pipeline for turning underwater survey imagery into 3D reconstructions, reef maps, and GIS outputs.

Scout Slack integration delivering BBNJ announcements with source links

Scout

Automated tracking of High Seas Treaty events, webinars, and announcements for Ocean Agentics.

Research

Published studies concerning marine environments and human impacts.

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Published

Mercury in dried market fish of Hong Kong and San Francisco: Human health implications

Vallentyne D., Zhao Z., Lee T. Y., McGuire D.

Journal of Asian Health, 2(1).

Published

Spatially explicit risk assessment of marine megafauna vulnerability to Indian Ocean tuna fisheries

Roberson L., Wilcox C., Boussarie G., Dugan E., Garilao C., Gonzalez K., Green M., Kark S., Kaschner K., Klein C. J., Rousseau Y., Vallentyne D., Watson J. E. M., Kiszka J. J.

Fish and Fisheries, 23(5), 1180–1201.

Expeditions

Field campaigns, underwater surveys, and research diving.

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A diver documenting a Bonaire reef with a paired-camera survey rig

Bonaire Baseline Surveys

Bonaire · 2023 and 2026. Custom survey equipment and repeat reef mapping, including a 2026 campaign covering 18 sites.

The Goto terminal structure photographed from the water, October 2026

Goto Terminal Survey

Photogrammetry beneath the Goto terminals for Rijkswaterstaat, documenting marine debris and reef condition.