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.
How to Seal Grout. When you are learning how to seal grout, you want to make sure you go slow and that you cover the entire surface of the ground. Try to stay in the grout lines as much as possible. As mentioned earlier, you want to use a bottle roller applicator, or a bottle brush applicator.