Octopus
 

Octopus

Protein Power: 25 g per 3 oz. serving

An increasing number of fishmongers are now offering up this seafood choice. So if your goal is to pack on granite-dense muscle you'd be a sucker—pun intended—not to reel it in for its protein windfall.

Need to Know: Frozen octopus actually has an advantage over fresh because the subzero process works to help tenderize the meat.