Tasman District has significant coastal ecological resources including:
- eight sites of international significance for shorebirds (Farewell Spit is also a RAMSAR site),
- the second and third largest estuaries in the South Island (Waimea and Wanganui Inlets respectively),
- large areas of natural dunelands (Farewell Spit),
- large areas of seagrass communities (particularly around Wanganui Inlet and Pūponga-Pākawau),
- salt turf communities of the West Coast part of the region,
- Tonga Island Marine Reserve and
- large areas of natural terrestrial coastal margins (around Abel Tasman and West Coast).