Immediately prior to construction, in any area that is potential habitat for the endangered Whites
Seahorse, underwater surveys must be performed by a marine ecologist to identify and relocate any Syngnathid species to suitable alternative habitat nearby (in consultation with DPI Fisheries). A Section 37 permit under the Fisheries Management Act must be obtained from DPI Fisheries for this Syngnathid relocation work.

Mitigation measures must also be employed to ensure that no vulnerable Black Rockcod are trapped within coffer dams.

The Biodiversity Study notes that the proposed dredging work has the potential to impact 300m2 of seagrass. DPI Fisheries considers this area of seagrass to be substantial. A permit to harm marine vegetation under s205 of the Fisheries Management Act will be required prior to construction. Any harm to marine vegetation will require offset or compensation at a rate of 2:1, in accordance with the DPI Policies and Guidelines for Fish Habitat Conservation and Management.

The Biodiversity Study notes that underwater noise could cause hearing loss, organ impacts and changes to behaviour. It would be helpful to see more information on the effects of underwater noise on seahorses, as these species are less able to relocate if noise becomes harmful.