Late last winter I moved our Ficus maclellandii (common name is Ficus Alii) near the turtle's temporary holding tank. I moved the tree to accommodate a Green Anole which is another story! In early summer, the tree sent an aerial root down into the water and created a bog filter (of sorts) that grew about 2 1/2 feet long by 1 1/2 feet wide beneath the surface. The tree obviously sensed the presence of water. Interestingly, like the Red Mangrove growing in there, it is of no turtle 'interest.' Just thought I would share another wonder of nature!