On the far side of the lake, a submarine disguised as a house is extending its periscope, unless it is a badly-drawn sunflower. In the absence of any indication of scale, we cannot be sure whether these are two normal-sized boots-traps on the shore, in front of a part-grown pair which have caught an unwary Library Pixie and are dragging him into the water to drown and devour the body at their leisure; or a normal sized aquatic pair and two huge ones in the foreground, in the manner of exoskeletal props from Castle of Otranto.
As any fule kno, life is all about mimicry, for predators and prey alike. Just look at the Mimic Elephant, which has evolved to resemble a wall, a pillar, a fan and a spear in order to evade detection by blind men. Also the corner of the room.The boots-trap is a highly-specialised organism with many unique features which make it hard to classify. Some zoologists consider it to be related to nemertean worms (on the basis of its proboscis), but in the consensus opinion it is a form of coelenterate.