Jellyfish at Kilim River Langkawi MALAYSIA

On Christmas morning of 2015, i went on a boat ride through the mangrove area of the river that runs into the Andaman Sea. The tide was rising and the water was murky with sediments flowing in. My last visit at the same river was Dec 2012. However, this time i saw lots of small jellyfish. I regretted not taking photos. From memory, there were at least two types but i only remembered one which had four distinctive circular shapes at the bell. Size wise most were small about fist size of an adult to a small child.