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a native pearly mussel (Anodonta implicata) overgrown with zebra mussels	the native pearly mussel Leptodea ochracea
Bosmina freyi a common zooplankter of the freshwater Hudson River	Striped bass larvae with zooplankton food items dissected from its gut
a PONAR grab	sediment sampling with a PONAR grab
pouring a sediment samples through a sieve	processing sediment samples