Stromatolites date back in the fossil record at least 2.7-3.5 billion years, the study of the few extant colonies still remaining in the marine environment may be instrumental in understanding the hydrospheric conditions that prevailed at the onset of life on Earth. Southern African tufa stromatolites, such as the ones to the west of Cape Recife, are regarded as unique in their nature, because they typically occur at the interface between freshwater seepage points and the marine penetration.
Ongoing work on estuaries includes fine-scale habitat use by fishes in regional estuaries, including assessing the effects of climate change water-chemistry scenarios on common marine fishes using estuaries as nursery areas. Some local estuarine work has expanded into the adjoining rivers. The current study has revealed a potentially new species of fish but more specimens are required for genetic analysis of the species.