Home > Roblox Guides > How to Catch the Mosasaurus in Fisch

How to Catch the Mosasaurus in Fisch

Published Date :

The Mosasaurus is a Mythical fish added after an update that added a brand new island to Fisch. Since it’s a very rare fish and a huge one at that, it will be a challenging catch if your fishing rod doesn’t have high resilience, control, and max weight stats. Here’s what you need in terms of bait, fishing rod, weather, time, and season to have the best chance of finding a Mosasaurus.

How to Find and Catch Mosasaurus in Fisch (Location)

ancient isle marker fisch

Mosasaurus can be caught from Ancient Isle and most have found it near the waterfall areas. It is a marked island that can be spotted when you’re on a boat. However, your journey toward the island can be tricky because various dangers will spring up along the way.

You have to dodge spikes, bombs, and whirlpools after you see the warning message “The sea is dangerous. sail with caution.” If your boat finds itself in a whirlpool, it will sink instantly and you will have to use your diving gear to swim towards Ancient Isle, depending on the distance. However, if your boat comes in contact with a barrel or spike, it will lose HP.

reaching ancient isle

When you’ve successfully reached Ancient Isle, wait for nighttime or speed up the process by using a Sundial totem. Since you also need Foggy weather, you can use a Smokescreen totem to trigger it. Lastly, any season is ideal for catching it.

The best rod to catch the Mosasaurus in Fisch during mid-game is Steady Rod, and any good rod like the Rod of the Depths, and No Life Rod can be useful to reel in this massive fish. It will also apply a -75% progress speed decrease which makes the choice of your fishing rod very important. Using the
Truffle Worm bait will grant a better chance of getting this creature as well.

Mosasaurus with mutation
image via StarlightSkiesYT/Fandom

If you’re lucky or have an enchantment on your fishing rod, you may also obtain mutated versions of the Mosasaurus which can look pretty bright and interesting!

That’s all about catching this creature, but if you’d like to know more secrets such as hidden locations, how to get a luck boost, and more, check out our Fisch guides on Gamer Tweak.

  • Build an Ore Crusher Codes (July 2026)

    Build an Ore Crusher Codes (July 2026)

    Published Date :

    Building an efficient mining empire takes effort and in Build an Ore Crusher, your goal is to create a processing line that goes from Crushing ores to earning cash for profit. As your operation grows, you’ll unlock better equipment, automate production, and earn enough money to expand your factory even further. To add to it,… Read More

  • Build an ASMR Tower Codes (July 2026)

    Build an ASMR Tower Codes (July 2026)

    Published Date :

    If you enjoy satisfying building games, Build an ASMR Tower offers a relaxing experience where every upgrade helps you construct an even taller structure. As you continue stacking blocks and improving your tower, Gems become an important resource for unlocking new mechanics and progressing more efficiently. That’s where Build an ASMR Tower codes come in.… Read More

  • Excuse Me Sir Codes (July 2026)

    Excuse Me Sir Codes (July 2026)

    Published Date :

    If you’re looking for free Lucky rolls, Anime Crates, Cash potions and more boosts in Excuse Me Sir on Roblox, this list has all the codes you need to redeem. The developers disable rewards often, so it’s best to claim the goodies right away! Last checked for new codes on July 21, 2026 All Excuse… Read More

  • Speedsters Infinite Codes (July 2026)

    Speedsters Infinite Codes (July 2026)

    Published Date :

    Games based on speed and racing are always going to be a rage on Roblox, and if you’re a fan of leveling up your speed from zero to lightning fast, this one’s for you. In this game, getting faster means unlocking more Rebirths and better Speedsters, which will require Gems and MPH bonuses. This is… Read More