Marlins are one of the biggest fish in-game. They are big in Harry and Peter levels and medium in Goliath levels, but never small, unless you use a Shrinshroom. They will never come like the barracuda or The Intruder. large ones eat herring, john dorys, humphead wrasse and pufferfish and are preyed on by leopard sharks and pelicans. The medium ones eat tuna and are preyed on by orcas. They last appear in Reefo Relaxo and are drawn out by the Intruder.
- Marlins are big as tuna but in Goliath levels, marlins are medium and tuna is small.
- Marlins (in real life) swim up to 80 km/h, but they are slow as other fish.