A crab's gills are not toxic. They just aren't very pleasant to eat. They don't taste terribly good and don't really have any meat on them, but if you want to eat them, they won't hurt you. Very few parts of any edible crab are going to be toxic.
Short answer: Yamato is alive and was released from the trap he was in during the war. His current job is keeping constant watch over Orochimaru.
Fresh yeast shouldn't really smell "bad." It has a distinct smell, but once it starts smelling bad, it's past its prime and I wouldn't use it. Dry yeast doesn't really smell of much.
THREE YEARTHREE YEAR WARRANTY PERIOD We may make changes to products and designs in the time you purchased your product and submitted a warranty claim.