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 using grout to fill the holes in travertine tiles you should seal the grout 72 hours after applying the grout to the travertine tile holes. The epoxy travertine filler does not have to be sealed but when using grout to fill holes in travertine tiles you will want to seal these areas of grout.