Which of the following is a marine biome?

The correct answer is Estuary.

Key Points

• Estuary:
  • An estuary is a coastal area where a river meets the ocean.
  • It is strongly affected by tidal actions and is very rich in nutrients and consequently very rich in biodiversity too. 
  • The organisms here are highly tolerant and many species are endemic. The ecosystem is known to have high food productivity.
  • However, this ecosystem has to be protected from pollution. 
• Various types of marine ecosystems are:
  • Salt marshes
  • Mangrove forests
  • Coral reefs
  • The open ocean
  • The deep-sea ocean