The Mongrogg were first spotted around heavily polluted coastlines in South-East Asia. There they dragged themselves forward with long arms, digging and clawing through the soil bottoms for trash, stray fish or anything at all that would fill their bellies. When driven out into deeper water the Mongrogg looses their ability to manoeuvre, and can be found drifting aimlessly across the open sea. Their great abdominal air-sacks keep them afloat, and their clawed limbs are swift enough for them to catch some fish and an occasional gull which they attract from miles away due to their natural smell of rotting flesh. When hitting a shoal, the Mongrogg tend to stay on to it to regain control, a behaviour that has aided many a captain in navigating safely past banks of sand and sunken rocks. This unintentional serving as sea marks soon produced the nickname Buoy, for this particular species.
The undersides of these creatures are clad in fat slimy tentacles. (Barely visible in the illustration) These are sensitive to electrical vibrations and help the Mongrogg in spotting and catching underwater prey.
(Whether or not the Buoy is a result of recent 'big-leap' mutation is still under debate... and some suggest illegal biomechanical experiments as the source.)