These were washed up all along the beach. This is old news: see the Anchorage Daily News article at the URI below.
quite fresh on Swimmers Beach
Date is approximate +/- 1 week. Species was Aequorea forskalea. These jellyfish resembled "breast implants" and were stingless. See http://www.stuff.co.nz/oddstuff/8251817/Jellyfish-uncannily-like-breast-implants.
Sort of looks like a bluebottle jellyfish, teardrop shaped balloon with blue mass attached.