Does "unwittingly snagged" mean "inadvertently grabbed"?

Context:
The South African fisherman who pulled a prehistoric-looking blue creature out of his net in 1938 had unwittingly snagged one of the zoological finds of the century: a 1.5-metre-long coelacanth, a type of fish that had been thought to have become extinct 70 million years earlier.
More:
http://www.nature.com/news/living-fossil-genome-unlocked-1.12809