Except when it comes to invasive species. Most beach garbage washes ashore with Zebra Snails attached---an invasive species causing havoc to the ecosystem.
The small fish in the picture puzzled me the other day. After searching the available information on the Internet I think it may be a Goby Fish, another invasive species from the ballasts of ships coming into the Great Lakes system. Relatively small, this tiny fish apparently packs a big environmental impact by taking over native habitat and eating the native's food. This one was dead on the shore and had a stab wound--- probably killed and dropped by one of the many shorebirds that were resting and feeding on the Lake Michigan shoreline.
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