Here is the full list of all 55 Animals Memory: Underwater Kingdom achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Pass level 55 time
Pass level 54 time
Pass level 53 time
Pass level 52 time
Pass level 51 time
Pass level 50 time
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Pass level 48 time
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Pass level 39 time
Pass level 38 time
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Pass level 32 time
Pass level 31 time
Pass level 30 time
Pass level 29 time
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Pass level 25 time
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Pass level 18 time
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Pass level 15 time
Pass level 14 time
Pass level 13 time
Pass level 12 time
Pass level 11 time
Pass level 10 time
Pass level 9 time
Pass level 8 time
Pass level 7 time
Pass level 6 time
Pass level 5 time
Pass level 4 time
Pass level 3 time
Pass level 2 time
Pass level 1 time