这个是签到两天解锁，我只玩了一天

剩下的大佬补充吧，目前只玩了一天，估计有些和开了多少次技能有关

刚解锁了一个

这两个居然能算隐藏鱼

同刚玩，刚发现一只

在外网reddit找的（英文版）
Here is a list of all fish requirements: (Will Skip Some Fish)
Sebae Clownfish - Take a picture of Percula Clownfish 3 times
Frostbite Clownfish - Own Clownfish fish of the 3 types
Royal Gramma Basslet & Candy Basslet - Purchase Seaweed Farm Own Cownfish fish of the 10 type
Clown Tang - SW Share a picture of Blue Tang 3 times
Gem Tang - Purchase Red Sea Fan & Tap Seaweed bubble 1 time
Moorish Idol & Powder Blue Tang- Purchase Red Sea Fan & Own Tang fish of 5 type
Convict Tang & Naso Tang- Purchase Red Sea Fan & Own Tang fish of 10 type
Fairy Wrasse & Hawaiian Cleaner Wrasse- Purchase Mysterious Starfish & Own Pebble (decoration)
Spotted Wrasse - Purchase Mysterious Starfish & Check Attendance 2 times
Checkerboard Wrasse & Spotted Mandarin Dragonet & Black and Gold Damsel - Purchase Mysterious Starfish & Own 5 Wrasse fish of the 5 type
Blue Fin Damsel - Purchase Mysterious Starfish & Place 3x Carpet Coral (Blue)
Cross Damsel - Purchase Mysterious Starfish & Place 3x Lying Carpet Coral (Blue)
Triangle Butterfly - Purchase White Anemone & Place x2 Lying Carpet Coral (Green)
Pajama Cardinal - Purchase White Anemone & Login 5 times at 13:00
Juvenile Pinnate Spadefish - Do nothing for 60 minutes
Redtail Butterfly - Purchase Pearly Anemone & Use any skill 20 times
Royal Dottyback - Purchase Pearly Anemone & Own 3x Broad Rock
Diadem Dottyback - Purchase Pearly Anemone & Watch an ad 25 times
Springer Dottyback - Purchase Pearly Anemone & Open Mystery Chest 10 times
Helfrich's Firefish - Purchase Cactus Coral & Tap Seaweed bubble 30 times
Flying Fish - Purchase Cactus Coral & Tap Sea Urchin bubble 30 times
Sea Slug - Reach Delicious Food Skill Lv. 5
Randall's Goby - Purchase Cactus Coral & Own x5 Anemone (Pink)
Scissortail Goby - Purchase Cactus Coral & Place x5 lying Anemone (Pink)
Yellow Watchman Goby - Purchase Cactus Coral & Place 30 tiles
Panther Grouper - Purchase Orange Cup Coral & Take a picture 100 times
Hatchet Fish - Purchase Orange Cup Coral & Reach Mystic Shell Artifact Lv. 3
Eastern Smooth Boxfish - Purchase Orange Cup & Own x5 Dark Rocky Road (A)
Yellow Boxfish - Purchase Orange Cup & Own x5 Dark Rocky Road (B)
Clown Trigger - Purchase Orange Cup & Reach Song of the Moon Skill Lv. 5
Camel Cowfish - Purchase Orange Cup & Tap Crab Bubble 10 times
Juvenile Spotted Boxfish - Purchase Blue Cabbage Coral & Tap Seaweed Bubble 50 times
Blackfin Tuna & Bigeye Tuna- Purchase Blue Cabbage Coral & Take a picture 3 times
Orange Seahorse - Purchase Blue Cabbage Coral & Own x5 Carpet Coral (Red)
Black Seahorse- Purchase Blue Cabbage Coral & Place x5 Lying Carpet Coral (Red)
Asfur Angel & French Angel - Purchase Green Spongodes & Own x5 Small Flat Rock
Queen Angle - Purchase Green Spongodes & Reach Remains of a Nautilus Artifact Lv. 10
Blobfish - Purchase Green Spongodes & Login 5 times at 19:00
Purple Queen Angelfish - Purchase Green Spongodes & Watch an ad 50 times
Keyhole Angelfish - Purchase Green Spongodes & Place x5 Sea Fan (Red)
Knothead Parrotfish - Purchase Glowing Sea Flower & Place 5 fish of Parrotfish type
Sea Pig - Purchase Glowing Sea Flower & Check attendance 10 times
Oarfish - Purchase Glowing Sea Flower & Do nothing for 120 minutes
Kemps Ridley Turtle - Purchase Glowing Sea Flower & Tap Krill Bubble 30 times
Ribbon Eel - Purchase Sapphire Sea Fan & Own x10 Anemone (White)
Chocolate Chip Starfish - Purchase Sapphire Sea Fan & Clear Daily Mission 100 times
Granulated Sea Star - Purchase Sapphire Sea Fan & Own x20 Lying Anemone (White)
Purple Sunstar - Purchase Sapphire Sea Fan & Share a picture 50 times
Leatherback Turtle - Purchase Ruby Cabbage Coral & Tap Krill bubble 50 times
Flatback Sea Turtle - Purchase Ruby Cabbage Coral & Watch an ad 150 times
Tasmanian Giant Crab - Purchase Ruby Cabbage Coral & Place x50 Dark Rocky Road (A)
Giant Squid - Purchase Ruby Cabbage Coral & Place 100 tiles
Piglet Squid - Purchase Ruby Cabbage Coral & Own x5 Anemone (Yellow)
Colossal Squid - Purchase Ruby Cabbage Coral & Place x5 Lying Anemone (Yellow)
Clearfin Lionfish - Purchase Star Horn Coral & Reach Mystic Shell Artifact Lv. 10
Weed Seadragon - Purchase Star Horn Coral & Own Ribbon Seadragon x2
Red Weedy Seadragon - Purchase Star Horn Coral & Own Weedy Seadragon x2
Giant Seadragon - Purchase Star Horn Coral & Own Seadragon fish of 10 type
Casper Octopus - Purchase Blue Table Coral & Tap Seaweed Bubble 100 times
White-Spotted Octopus - Purchase Blue Table Coral & Tap Clam Bubble 100 times
Mauve Stinger - Purchase White Swing Anemone & Use any skill 300 times
Torpedo Ray - Purchase White Swing Anemone & Check attendance 20 times
Red Sunfish - Purchase Orange Blade Coral & Use 10000 Gems
Manta Ray - Purchase Orange Blade Coral & Reach Glowing Conch Artifact Lv. 10
Zebra Bullhead Shark - Purchase Orange Blade Coral & Check attendance 30 times
Black Marlin - Purchase Orange Blade Coral & Own x10 Striped Marlin
Killer Whale - Purchase Orange Blade Coral & Watch an ad 200 times
Vaquita - Purchase Pink Tree Coral & Own Dolphin fish of 20 type
Whale Shark - Purchase Pink Tree Coral & Harvest 10000 Vitality Above Fish
Epaulette Shark - Purchase Pink Tree Coral & Clear Daily Mission 200 times
Spinner Dolphin - Purchase Green Giant Kelp & Use any skill 500 times
Migaloo - Purchase Green Giant Kelp & Own x5 Giant Blue Whale

OK，解锁了一个