Translation:Your turtle is younger than my crab.
Yes. Actually there was a typo in the word "tortoise" in Incubator, so I fixed it now.
In everyday language, we do not differentiate between a turtle and a tortoise. If you need to be a bit more specific, then turtle is usually "żółw morski" (sea turtle) or sometimes "żółw wodny" (water turtle), while tortoise is "żółw lądowy" (land turtle).