Deserts are not marine ecosystems and are not found in India's coastal regions.

The Andaman and Nicobar Islands are home to the largest coral reef ecosystem in India, known as the Andaman and Nicobar Coral Reefs.

Mangroves provide habitat for various marine species, protect coastlines from erosion, and help filter pollutants from the water.

Coral reefs are known for their exceptional biodiversity and are often compared to rainforests due to the diverse range of species they support.

Phytoplankton are microscopic algae that serve as the primary food source for many filter-feeding organisms in marine ecosystems.

Estuaries are formed where rivers meet the ocean, creating a unique ecosystem with a mix of freshwater and saltwater.

Seagrass beds provide habitat for various marine species, stabilize sediments, and help filter pollutants from the water.

Oceanic upwelling zones are areas where nutrient-rich waters rise to the surface, leading to increased productivity and supporting diverse marine life.

Rising sea temperatures due to climate change are the primary cause of coral bleaching, which can lead to coral death and the degradation of reef ecosystems.

Mangroves are known for their ability to filter pollutants and provide nursery grounds for various fish species, making them important coastal ecosystems.

Phytoplankton play a crucial role in marine ecosystems by producing oxygen, consuming carbon dioxide, and serving as a primary food source for zooplankton.

Intertidal zones are areas between high and low tide marks, characterized by high biodiversity and a variety of marine organisms adapted to changing conditions.

Zooplankton play a crucial role in marine ecosystems by consuming phytoplankton, providing food for larger marine animals, and contributing to the decomposition of organic matter.

Hydrothermal vent ecosystems are unique deep-sea environments where nutrient-rich water from the Earth's crust supports a diverse community of organisms.

Seagrass beds face multiple threats, including pollution, overfishing, climate change, and coastal development, leading to their decline in many areas.