The Alien Planet Portal is one of the two portals in Hungry Shark Evolution. The portal is found near a crashed spaceship (deep within the area where the Tiger Shark starts). If the Tiger Shark or bigger sharks are not used, the portal seems to be inactive. Moving near it causes the screen to zoom out, and it could teleport you to the Alien Planet. As of the 2017 Shark week update, it became the Shawaii portal. It now can only be accessed every 2 hours.
Caution in approaching the portal is mostly advised, since an Enemy Mr. Snappy often spawns, guarding the portal. However, if you rush to the portal before 1 minute, the Mr. Snappy is less likely to spawn.