The best replacement for dolphins is porpoises.

The best alternatives to dolphins are rated as following:
★★★★★  porpoises
★★★★  sharks
★★★★  jets
★★★  whales
★★★  patriots
★★  lovers
★  saints
★  steelers
★  bills
★  ravens
★  couple
★  browns
★  lions
★  whales smarter
★  bengals
★  colts
★  chimps smarter
★  porpoise
  jets tickets
  carolina panthers
  dallas cowboys
  jaguars
  are dolphins whales
  panthers
  marlins
  bears
  chargers
  atlanta falcons
  jets score
  tennessee titans
  buccaneers
  chiefs
  pittsburgh steelers
  new england patriots
  miami
  kansas city chiefs
  bucs
  chicago bears

Your alternative for dolphins is not listed? Suggest!
Speaking about dolphins, one probably shouldn't forget about surfers.

Other search terms related to dolphins and their ratings are:
★★★★★ surfers
★ robin williams
You have in mind a companion for dolphins and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of dolphins in all years. Click on graph for more.
dolphins
porpoises
sharks