The piano tuna is named for its unique and complex mating cry, which many describe as sounding like a harmonious musical improvisation. It usually "sings" in B Minor.
Ginger Guppy
Anywhere
Common
None
This little round guppy is simply the cutest thing you'll find in the waters of Aurania. Not only is it visually adorable, but it's also very sweet-natured and eager to please. An excellent companion fish.
Jerkfish
Anywhere
Common
None
The common jerkfish has an unusual culinary property - the less happy it is, the worse it tastes when eaten. Unfortunately, it spends its life in a near-constant bad mood, rendering it almost permanently unpalatable. It is also rude.
Salty Bass
Sea
Common
None
As bitter in flavour as it is in temperament. To balance the flavour, it should be served with citrus fruit or cider vinegar. As for its temperament, there's nothing to be done.
Pinchmaster
Shore
Common
None
The pinchmaster is a somewhat common sight on the beaches of Aurania. Burrowing partially underground, it disguises itself as a common (and delicious) beach orange. When a naive passer-by attempts to pick up the 'fruit', believing they've stumbled upon a tasty citrus snack, the cruel crustacean pinches their nose with gleeful depravity.
Fruitfrog
River
Common
None
The fruitfrog is so named because it tastes like peaches in spring, tangerines in summer, apples in autumn and plums in winter. It is also highly poisonous.
Lemon Loach
Grass biome
Uncommon
None
This brightly coloured bottom-feeder is known to freshen the waters in which it swims. While lemon loaches are delicious, their advocates encourage people to keep them as pets rather than eating them, citing their fresh, lemony scent as a compelling reason to do so.
Storm Jelly
Grass biome
Uncommon
Severe weather
The storm jelly often emerges during thunderstorms, absorbing residual electricity from the air to maintain its own internal battery. It can discharge this electricity in small amounts to stun potential prey.
Lime Sole
Grass biome
Rare
None
These lime-green flatfish are hard to spot beneath the swaying aquatic plants of the lush waters they call home. This is perhaps for the best, as lime sole are somewhat grumpy when disturbed, and produce a glutinous, sour-smelling slime whenever their tranquil solitude is disrupted.
Eclectic Eel
Ice biome
Uncommon
None
Despite its lack of limbs, the eclectic eel manages to cultivate a varied and diverse skill set.
Dreadfish
Ice biome
Uncommon
Severe weather
When the undead warriors of Felheim are defeated in bodies of water, it is not unheard of for the necromantic magic that binds them to disperse, reviving the remains of nearby fish. Dreadfish are almost entirely harmless. What's more, lacking a digestive system, they do not need to eat. As a consequence, they make for low-cost, low-maintenance pets
Snuffish
Ice biome
Rare
None
An attractive but dangerous creature, the snuffish spits an icy fluid when threatened... or excited... or mildly surprised.
Toy Koi
Desert biome
Uncommon
None
Ever so dainty and ever so elegant, the diminutive toy koi is prized for its grace and beauty.*
*The Toy Koi is not an actual toy, and should not be played with.
Clockwork Fish
Desert biome
Uncommon
Severe weather
Several hundred clockwork fish are released by Heavensong ecologists each year and used to monitor water quality. They are attractive and engaging little mechanical creatures. On fine, bright days, young children seek them out and make a game of chasing them through the shallows. They are affectionately known as ticktocks.
Red Flapper
Desert biome
Rare
None
When even mildly excited, it will loudly clap its front fins together in noisy appreciation. The sound travels extremely far underwater, to the irritation of all other aquatic species. Needless to say, the red flapper is a very unpopular fish.
Boot
Anywhere
Common
None
Whilst the denizens of Aurania have a general respect for their environment, it isn't unheard of for old footwear to find its way to the bottom of rivers and oceans. While it isn't itself a fish, there might possibly be one living inside it. Possibly...
Chucklefish
Anywhere
Rare
Severe weather
Hehehe! You found me!
Starfish
Anywhere
Common
Caught all 17 fish
Have 199 Stars
It is the mark of a great angler to catch the starfish, for although they are numerous, they are also extremely elusive. Once a starfish has been caught, it forms an instant attachment to the individual who hooked it, and will wish to stay with them forever. They produce a soft, tuneful song when exposed to the light of the evening star, though only while that celestial body still hangs low in the sky.
Prior to the Double Trouble DLC, the Starfish was the 200th and final Star in the game.
Despite the description of the Twinkling Tactician achievement, the criteria is actually the Starfish, and not to reach 200 Stars.
Virtually every fish name is a pun of some type.
Word puns are often reffered to as "Dad jokes". Their inclusion is possibly in reference to the fish being caught by Mercia's father.
The Chucklefish is a direct reference to the development team's mascot character.
The Starfish is the only fish that can only be caught once.
The Snuffish and Jerkfish are types of fish from Starbound[1][2].
The Snuffish is found in oceans and come in several varieties. It is noted they are "easily surprised".
The Jerkfish, similar to in WarGroove, is common and caught in any condition so long as it is a normal ocean.
In the Codex entry for Heronguard is a reference to the 'Sailfish', found at the Scorched Beach in eastern Heavensong. However, these fish cannot be obtained and are never seen.
The are described as 'lightning-fast' and caught using spear-fishing, implying they cannot be caught by simple fishing techniques.