Sea sponges need oxygen, as fish and people do

Sea sponges need oxygen, as fish and people do

Sea sponges need oxygen, as fish and people do

Wool sponge. Photo by Mark Butler.

The inconspicuous sea sponges are Earth’s oldest multicellular animals and have filtered the oceans for nearly 900 million years, long before the first plants appeared on land. New research appearing in the journal Fisheries Bulletin, published by the National Oceanic and Atmospheric Administration, indicates that their growth depends on their oxygen supply in a manner similar to more complex animals such as fish.

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Protecting 30 per cent of the ocean by 2030 would barely impact fisheries

Protecting 30 per cent of the ocean by 2030 would barely impact fisheries

Protecting 30 per cent of the ocean by 2030 would barely impact fisheries

A view from the north on the Marine Protected Area of Capo Carbonara and the island of Cavoli in Sardinia, Italy. Photo by dronepicr, Flickr.

Conserving marine biodiversity, avoiding species extinction and maintaining food security from wild capture fisheries can all be achieved simultaneously if a global, non-regionalized approach to marine spatial management is undertaken by the signatories of IUCN Resolution 50, which calls for the protection of 30 per cent of the ocean by 2030.

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