Bottom-Feeders:

Human bottom-feeders are annoying, poisonous leeches that thrive off of other people's achievements, having no level they will not sink to in their gambits for more power or wealth.  They are so described, because of their similarity aquatic creatures that live in much the same manner.  Catfish, shrimp, crawfish, crabs, lobster, and other bottom feeders live mostly near the bottom of the waterway they live in, feeding off of the discarded waste and unfinished food that other creatures leave behind, or other weaker animals.  As a result, they tend to absorb a lot more heavy metals from sick food that falls down to them, as well as not needing to move as quickly as creatures that swim closer to the surface, growing more fat.  While any aquatic food, especially fish, is recommended to eat in moderation, catfish and other bottom feeders are recommended to eat even less often so as to prevent becoming ill from toxic metal poisoning as well as all the fat.