Larvae to Legends: Unraveling Fish Life Cycles in the Marianas

Studying fish life histories , from larval stages to adulthood, helps us better understand and manage the species that support local communities and economies. Our scientists work closely with fishers and partners across the Pacific Islands to collect important information that supports healthy and sustainable fisheries.

In summer 2025, a small team of NOAA scientists traveled to the Mariana Archipelago for a cooperative fish population and life history survey. Aboard NOAA Ship Oscar Elton Sette , our scientists worked with local fishermen to survey the waters from Anatahan to Uracas (Farallon de Pajaros).

During the day, our life history surveys focused on bottomfish species such as snappers, groupers, and jacks. These species are key to commercial, recreational, and subsistence fishing in the region. By examining age, growth, mortality, and reproduction, we gain insights into maintaining healthy fish populations for the future.

Throughout the night, our ichthyoplankton survey team conducted net trawl tows , focusing on commercial fish species such as tuna, mahimahi, and billfish. This research provides us with comprehensive data about fish reproductive behaviors and population dispersal.

This mission was made possible through strong collaboration, shared knowledge, and a transparent approach between scientists and the local community.

(NOAA Fisheries permits: #10509-25, #10521-25)