Mumbai is a city of geographical dichotomy. On one hand, it's an urban jungle where matchbox buildings stand cheek by jowl. And on the other, it has a 149-km coastline that opens out into the vast waters of the Arabian Sea. But we are so caught up that we tend to forget about the diverse range of marine life in our vicinity. That's why a festival called Coastwise returns for its second edition this weekend, to highlight the near-invisible flora and fauna that call the city's beaches home.

Three organisations — Mangrove Foundation, Marine Life of Mumbai and WWF-India — have joined hands to host it. The idea is to put together events aimed at showcasing the marine ecosystem. Caroline Pais, education officer at WWF-India, tells us, "Our aim is to instill a sense of pride in people about our biodiversity. We want them to understand how lucky we are that even though Mumbai is concretised, we have a wealth of natural life that we need to preserve."
Here are four activities from the festival that you can attend.