Natural History Museum - Adaptations some fish have to make

At the NHM I had a look at the ecology section and came across a really bazaar fish, that goes into the ground to survive. The fish will squish its self into the mud below the former water source it was living in, this is amazing that this fish has figured out away to overcome his problems (water drying up) and gone lower into the earth to soak up enough water to survive. This though is intriguing, it made me wonder about what adaptations we in the future will have to make to survive in the potentially hostile environment we may face.