As the monsoon season approaches, a fascinating natural occurrence has been spotted along Mumbai’s coastline. Numerous beachgoers at Juhu Beach have observed bright blue sea creatures called Blue Buttons (Porpita porpita) washing up onshore. These striking organisms are more than just an eye-catching sight—they serve as nature’s way of signaling the arrival of the rains.
What Are Blue Buttons?
Though they resemble jellyfish, Blue Buttons are actually colonies of tiny organisms known as zooids that work together. Part of the Cnidaria family—which also includes jellyfish and corals—each Blue Button has a central disc, usually blue or purple, encircled by fine, tentacle-like structures that help with buoyancy and feeding.
Tied to the Monsoon
The presence of Blue Buttons along Mumbai’s beaches typically coincides with the onset of the monsoon. Factors such as ocean temperature, salinity, currents, and nutrient levels play a role in guiding these organisms toward the shore, where conditions become ideal for their growth and movement.
Signs of Environmental Change
The growing number of Blue Buttons found on the beach is likely linked to urban expansion and coastal pollution. Human activity can disrupt natural marine habitats, causing these creatures to become stranded. Additionally, runoff rich in nutrients from cities can fuel plankton blooms, which in turn support the growth of Blue Buttons.
Health Advisory
Although they are not dangerous, Blue Buttons can cause minor skin irritation if touched. Visitors are urged to avoid handling them and to be careful when walking barefoot. If irritation does occur, rinsing the skin with seawater and seeking medical help if needed is advised.
A Coastal Wonder
The emergence of Blue Buttons serves as a beautiful and timely reminder of the delicate balance between marine ecosystems and seasonal transitions. As Mumbai gears up for the rains, these creatures offer a rare look into the rhythms of coastal life.
If you’d like to see them for yourself, visiting Juhu Beach at the start of the monsoon might give you a glimpse—but remember to observe responsibly and help protect the marine environment.