Sponge Reef Areas Along Pacific Coast of Canada and United States

Sponge reef areas are mapped from three source shapefiles covering the Pacific coast of Canada and the United States. The dataset provides geospatial polygons detailing the location and extent of these unique glass sponge habitats. It is published by Fisheries and Oceans Canada and was last updated in March 2026.

Use Cases

• Analyze the spatial extent of sponge reef polygons for marine conservation planning.
• Overlay sponge reef area data with other marine habitat layers to study ecological connectivity.
• Use the geospatial polygons for GIS-based environmental impact assessments of coastal activities.

Strengths

• Data is derived from authoritative sources including Natural Resources Canada (NRCan) and Fisheries and Oceans Canada (DFO).
• Provides a consolidated map from three distinct source shapefiles for a complete view.
• Offered in multiple geospatial formats including SHP, GEOJSON, and ESRI REST services for flexibility.

Limitations

• The specific number of individual reef polygons or total area covered is not provided in the input.
• No temporal range is specified, so the recency of the underlying survey data is unclear.
• The dataset's description does not include attribute columns, limiting detailed non-spatial analysis.

Provenance

Source

Fisheries and Oceans Canada, Natural Resources Canada

Collection Method

Derived from three source shapefiles: Sponge_Reef_West_Coast, Howesound_Nine_reef_polygons, and HoweSound_Five_reef_polygons.

Freshness

Last updated March 2026.

Geography

Pacific coast of Canada and the United States