Skip To...
Making boatloads of money in Roblox Fisch is the ultimate goal, right? You make money, get better fishing rods, maybe a nice boat or two, then catch larger and larger fish. Rinse and repeat until you’re so wealthy the next “best rod” is all but yours. While you could stick to fishing smaller, easier creatures for quick cash, these fish in Roblox Fisch will make you a bunch of money just from catching it once.
Magma Leviathan

Even if you don’t want to fish Magma Leviathan for cash, it’s still worth doing at least once because it’s tied to the zones in Mariana’s Veil. It’s one of three fish that are needed to unlock Veil of the Forsaken, where you can reach Scylla—the most valuable fish in Roblox Fisch.
Now, to get the Magma Leviathan, you need to first be in Mariana’s Veil. That means finishing Dr. Glimmerfin’s quest on Roslit Bay. You’ll come to the Volcanic Vents zone, first. Voila! You’re right where you need to be.
Another problem: Magma Leviathan is a Secret-rarity fish, so it’s both difficult to catch and, well, very rare. It doesn’t even appear in your Bestiary. If you have a fishing rod like the Rod of the Depths, you shouldn’t have a problem, with enough patience. Snagging a Magma Leviathan will net you, at minimum, $10,000 credits a piece.
Crystallized Seadragon

Yet another Secret-rarity fish in Mariana’s Veil, and the fourth most valuable fish in Roblox Fisch, is the Crystallized Seadragon. In terms of monetary value, the Crystallized Seadragon is worth 50% more than a Magma Leviathan, so around $15,000 credits.
And best of all? You don’t need a super expensive fishing rod to catch one. Something as inexpensive (relatively speaking) as the Avalanche Rod will do just fine, though you’ll need plenty of patience and some good bait, like Shark Head.
To find Crystallized Seadragons in Roblox Fisch, you have to unlock the Calm Zone in Mariana’s Veil, the second to last area before Veil of the Forsaken.
Ancient Kraken

The Kraken is already a pretty valuable fish, netting you about $10,000 credits, and that’s without mutations. But the Ancient Kraken? It’s nearly three times as valuable, and you don’t have to go far to find one.
First, you need to gain access to Atlantis, where there are five Mythological Clock puzzles. You’ll then gain access to the Kraken Pools, where you can then fish for Krakens during the Kraken Hunt, a server event. However, you must use a Poseidon Wrath Totem during the Kraken Hunt to trigger their spawn.
If you have the King’s Rod, then you’re in a good position to catch an Ancient Kraken. Truffle Worms are its preferred food, so be sure to stock up on them by farming Volcanic Geodes.
Moby

The second most valuable fist in Roblox Fisch is the Moby, a massive whale weighing, at minimum, 90,000kg. If you can manage to catch Moby, you’ll get $30,000, which you can easily multiply with a special fishing rod, like Rod of the Eternal King.
Now, the Moby can be fished in the Ocean zone, but you’ll need to wait until a Whale Migration event. When one spawns, you’ll get a notification. While summer will give you the best odds, it isn’t required, but you should at least bring Squid bait.
Additionally, any fishing rod with high Resilience, Luck, and Control will be ideal. Even the Steady Rod will work if you have the patience. Oh, and if you’re unlucky and manage to catch a Blue Whale instead, those are still valuable.
Scylla

And the most valuable of all—the Scylla. It has the highest value out of all the fish in Roblox Fisch. Even at its lowest weight, you could be bringing in $80,000 credits, but on average you’ll be getting over $100,000 credits for a single Scylla.
However, Scylla is incredibly hard to catch. You need a fishing rod with high stats across the board, like the Ethereal Prism Rod. More importantly, the fishing rod should also have an effect to increase Scylla’s value and make it more worthwhile. In the case of the Ethereal Prism Rod, you can turn that $80,000 credits into $640,000!
To capture Scylla, you need to enter Mariana’s Veil, unlock the Veil of the Forsaken, and defeat it with the Ancient Crossbow (which you build in the area). Only one person will be able to catch Scylla, just like the Megalodon, so good luck!