# Ai2 — How Molmo 2’s open release helped an MIT researcher rethink fish tracking

- Company: Ai2 (allenai.org)
- Announced: 2026-10-13
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://allenai.org/blog/molmo2fish
- Record: https://forck.live/items/20637-how-molmo-2-s-open-release-helped-an-mit-researcher-rethink-fish-tracking
- Subject: Olmo / Molmo / Asta
- Models affected: Molmo 2, Molmo2Fish

Ai2 published a case study about MIT researcher Kai Van Brunt, who adapted the open vision-language model Molmo 2 to create Molmo2Fish, a system that tracks salmon in underwater sonar footage and can correct its predictions based on natural-language instructions. The project demonstrates how open model releases enable researchers to apply existing capabilities to specialized ecological problems.

## Evidence

Verbatim from https://allenai.org/blog/molmo2fish:

> Van Brunt then trained Molmo2Fish to respond when a user pointed out an error. The model saw examples of an initial prediction, an instruction describing how it should change, and the corrected result.

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Record: https://forck.live/items/20637-how-molmo-2-s-open-release-helped-an-mit-researcher-rethink-fish-tracking
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