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.
When you have finished sealing the grout, allow the solution to soak in for about 10 minutes. Then, use a microfiber cloth, towel, or old t-shirt to wipe the excess solution off of the grout and tiles. 4. The next day, run a wet mop over the area you sealed, just to make sure you got up all of the excess solution.