Complex sentence: Throughout his lifetime Gronovius amassed an extensive collection of zoological and botanical specimens, and is especially remembered for his work in ichthyology, where he played a significant role in the classification of fishes.
Split into simpler sentences: Throughout his lifetime Gronovius amassed an extensive collection of zoological and botanical specimens. He is especially remembered for his work in the field of ichthyology, where he played a significant role in the classification of fishes.