This paper presents distribution records of 184 fish species surveyed in rocky reef habitats on the west coast of India. Surveys were completed in situ by SCUBA diving. Twelve species appear to be new records for India based on previous literature including Fishbase. These are in the families Apogonidae, Pempheridae, Cirrhitidae, Pomacentridae, Acanthuridae, Balistidae, Monocanthidae, and Ostraciidae. Most fish species for which there are IUCN assessments were in the Least Concern category. However, one species was Endangered, two species Vulnerable, and three species Near Threatened. Several Data Deficient species were also recorded, which presents opportunities for research to strengthen conservation.
Grande Island is less explored for its biological diversity and this study provides the first comprehensive report on the coral community structure, Live coral cover and its diversity were high in the mid-shelf zone (5–8 m) compared to the shallow (8 m), Competition posed by turf algae and sponges was the predominant stressor affecting the live coral colonies, Coral diseases such as white plaque disease and trematodiosis were common among the live coral colonies.
Interestingly, a recent study from the journal Nature Communications exploring the effects of declining fish species on the health of coral reefs found that it was not a decrease in the number of species that most affected reef vitality, but rather a decrease in the amount of fish urine circulating in the water..
In the northern region of the Great Barrier Reef, about 67 percent of the corals have died over the last 8-9 months, making it the largest loss of corals ever recorded for the Great Barrier Reef, scientists say. On some reefs in the northern part of the Great Barrier, nearly all corals have died. But the central and southern part of the Great Barrier seem to have fared better, suffering “minor” damage compared to the northern region. Scientists expect that it will take at least 10-15 years for corals in the northern region to regrow, but a fourth bleaching event could strike the region before the reefs have had the chance to recover completely.