Opportunistic feeders, their diet varies from one region to another. In the Antarctic, killer whales eat about 67% fishes, 27% marine mammals, and 6% squids. Killer whales in the Bering Sea (near Alaska) eat about 65% fishes, 20% squids, and 15% marine mammals.
Even though your shower grout looks dry, using it too early or sealing it before it's ready may damage it, leading to premature failure. Most cement-based grouts require a cure time of 48 to 72 hours before applying a penetrating sealer.
1 Pour a small amount of sealant on the grout and work it in with a sponge, using small, circular motions. 2  Wipe the sealant off after about 5 to 10 minutes, although the time may vary. 3  Check the sealant label to be sure. 4  Re-seal the grout every six months to a year if possible.