Oceanic Manta Ray Survey with Manta Watch New Zealand

Research Team

• Lydia Green
• Beth Rose
• Sanaa Nair

Project Overview

Oceanic manta rays play a vital role in maintaining healthy marine ecosystems by promoting nutrient cycling and supporting planktonic food webs. Despite their ecological importance, manta rays in New Zealand remain understudied, with limited data on their movements and habitat use. Research in the Hauraki Gulf aims to bridge this knowledge gap, contributing to the conservation and protection of these iconic species.

Duration of Project

Ongoing

Expedition Summary

On December 11th, 2024, The International SeaKeepers Society South Pacific facilitated a one-day expedition in the Hauraki Gulf aboard the DISCOVERY Yacht Render. The expedition aimed to survey oceanic manta rays, document individual sightings, and contribute to ongoing research on their seasonal distribution and habitat use.
The team surveyed key regions of the Gulf, including the waters surrounding Aotea/Great Barrier Island and further into the pelagic zones. We covered 77 Nautical Miles and just over 8 hours out on the water. While no manta rays were encountered during the expedition, the day offered incredible sightings of pelagic orcas, dolphins, and albatross highlighting the region's biodiversity.

Application

Manta rays are globally endangered. These observations underscore the Hauraki Gulf's importance as a marine ecosystem and its potential as a hotspot for pelagic megafauna. Although no mantas were spotted, documenting other species' behavior and presence provides valuable ecological context for future surveys. The trip’s findings contribute to a broader understanding of the Gulf's marine life and help refine strategies for ongoing manta ray research.

Location

Hauraki Gulf, New Zealand