Iron Sucker

The iron sucker has split from the green swarmer and moved to the iron-rich Ittiz Swamp. Instead of swimming around to collect microorganisms, it sifts though the mud on the bottom. As a result, it's mouth has evolved into a sucker and points down. It's lower two tentacles have shaped themselves into fins and it's top two tentacles are now used to keep itself steady in moving currents. Because the swamp is dark and brackish, it no longer relies on sunlight for food. Thus, it spends most of eats time eating. Most of the organisms it eats use iron in some way, which gets transferred to its skin, giving it a dark, red, rusty color.