Numerous plant (trees and grass) and animal (unstudied) populations can be found on Ulenge Island.

Daily tidal wash through in the mangrove ecosystem on Ulenge results in a relatively thin layer of silt buildup.

[5] According to Birdlife International, the Ulenge and Kwale Island Marine Reserves are located in IBM 35, an important bird region.

[7] Turbidity and bottom sediment type, which are regulated by rainfall/river discharge patterns and oceanic conditions, determine the amount and distribution of seagrass.

The results of the manta tow and swimming benthic cover surveys showed a relatively small area of patchy coral reefs that were stressed by sediments from Tanga Bay and nearby rivers.