In a unique endeavour to preserve the delicate ecosystem of Tauranga’s waterfront, environmentalists and marine experts are orchestrating the careful relocation of a one-of-a-kind sneezing sea sponge.

Resembling a captivating blend of a large blue cauliflower, this rare marine organism was discovered in 2020 by University of Waikato student Sam McCormack.

After being found growing on an old pile of seawall rock and debris in the area, the blue sponge, which can grow over one metre in diameter, has become a focal point of conservation efforts as Beacon Wharf undergoes redevelopment. The sponge appears to form massive, pale blue-grey, multi-lobed cushions.

Named Te Awanui by local iwi to symbolize its connection to Tauranga Moana and the community, the sneezing sea sponge, which has the scientific name ‘Dysidea teawanui’ is believed to be the only one of its type in the world. The sponge has the ability to get rid of any sediment covering it, or ‘sneeze’ it off.

Waikato University Coastal Science Professor Chris Battershill says researchers are "finding some very exciting molecular structures which we know have strong bioactive properties”.

Describing the sponges as filters for the sea, Chris says they play a significant role in terms of the food chain and create a lot of productivity on the seabed.

“We were aware that the Blue Sponge was living along this stretch of water, so its careful relocation was an essential step to take before we commenced the redevelopment of Beacon Wharf last year,” says Tauranga City Council Civic Redevelopment Projects Senior Programme Manager Beau Fraser.

“We worked with Tonkin Taylor, Bay Underwater Services and the University of Waikato, to ensure the safe relocation of the sponge and its habitat further towards the Cargo Shed along the same stretch of water.”

Beau says beyond creating a recreational space for the community in the area, the redevelopment of Beacon Wharf aligns with the Council’s dedication to preserving the unique ecosystems that contribute to the vibrancy of the city.

“We're also redeveloping the sea wall further south along the waterfront, near the tidal steps and Fisherman’s Wharf area, which includes 8000 tonnes of stones going in over the next six months,” says Beau.

“The living sea wall pods that have been installed there will bring marine life into the waterfront and encourage it to grow in that location.”
Beau says the discovery of the blue sponge hasn’t impacted any of the redevelopment plans.

Dysidea Teawanui – Massive, hemispherical to multilobed specimens covering rocks and boulders at Dive Crescent Tauranga Harbour at a depth of five metres.

The intricate relocation process aims to safeguard the distinctive habitat of the Te Awanui sponge, highlighting the delicate balance between urban development and the preservation of rare marine life his this picturesque coastal region.

The major transformation of the old Beacon Wharf site is expected to be finished by spring this year and will feature a new gangway, pontoon and improved landscaping with a viewing platform, along with a refurbished seawall which will include five living seawall pods. The new pontoon will provide easier access to the inner harbour for recreational boats, kayaks, paddleboards and a place to enjoy fishing.

For more information about the Beacon Wharf development click here