The intertidal zones of different koliwadas of Mumbai exhibit a diversity of ecologies. Worli Koliwada has rocky shores whereas Trombay Koliwada has a sticky mud called, ‘chikhal’. The sticky quicksand is brown at the surface but the layers underneath turn mat-black, especially near inlets of sewage.
Trombay’s chikhal holds a growing wet mangrove forest, home to multiple living organisms. These include older occupants like crabs, mudskippers and snails along with a burgeoning population of newer occupants, like flamingos.