You might want to ask your travel agent or tour company about the tipping policy before leaving for Galapagos. On most cruise ships, cash tips are given separately to the crew and to the guide. Policies differ depending on the cruise line and, of course, the level of service and your personal preference. A good rule of thumb is to figure on $15/day for the guide ($100 for a week long cruise) and another equal amount that the crew members will divide among themselves. Often additional tips are given to individual crew members for exceptional service. For more comprehensive information about tipping read our Publication, Nature Interpreter on Medium.com.