The best replacement for turtles is tortoises.

The best alternatives to turtles are rated as following:
★★★★★  tortoises
★★★  tortoise
★★★  shredder
★★★  power rangers
★★  terrapins
★  land turtles
★  frogs
★  shredder 2012
★  millionaires
  bardock
  snails
  tortoises and terrapins
  tmnt
  turtles
  pixies
  box turtles

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

Other search terms related to turtles and their ratings are:
★★★★★ salmonella
★★ oscars
You have in mind a companion for turtles and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of turtles in all years. Click on graph for more.
turtles
tortoises
tortoise