Here is the full list of all 18 Girls Overboard achievements.
You've Cast Net 1,000 times
Max relationship with Miya
Max relationship with Coraleen
Max relationship with Octavia
You've earned $1,000,000 in Sand Dollars
You've given total of 100 Gifts
You Max Relationship with 7 main love interests.
Unlock all 7 main love interests.
Max relationship with Ami
Max relationship with Claudia
You've purchased 10 five-star Outfits
Max relationship with Emerelda
You've used 25 Fresh Water
Max relationship with Lisa
Unlock all Gallery Illustrations
You've completed the tutorial!
You've max out the Net Upgrade
You've used Sell All Gems a total of 50 times