were trying to feed freeze dried krill as we were giving our banded some awesome squid but ran out and she just wont take anything else. I figured she would eat eventually we just havnt had a whole lot of luck. We tried silversides, frozen squid chunks that did a great job at spiking my nitrates, and other "Frozen" formulas.. shoot we even tried people grade octopus and squid from the grocery store (talk about a fortune) that literally just got thrown out. Were going to try a Japanese market pretty soon here if we can find one.. a few LFS have told us that they might have something for the shark.. we'll see