Planet Zoo 2 Brown Trout — habitat, biome, size & which animals it can live with

Brown Trout is one of the 130 Planet Zoo 2 launch species. It is housed in a Aquarium / Exhibit habitat, accepts the Lakes & Rivers biome, carries a no barrier requirement and is listed at no published size. It shares a biome and an enclosure type with 11 other species, so it can be mixed into a shared enclosure — 6 of those pairings are confirmed by Frontier's own text.

Brown Trout

Every figure on this page comes from the official Planet Zoo 2 Zoopedia export rather than trailer footage: biome, enclosure type, barrier grade, size and the compatibility verdicts are all taken from the game's own data.

Size (M)—

Weight (M)—

Barrier—

EnclosureAquarium / Exhibit

BiomesLakes & Rivers

StatusLeast Concern

Where it lives in the wild
Europe

Brown Trout at a glance

Source: official Planet Zoo 2 Zoopedia export (130 species). Also on the searchable animal list.

Enclosure and barrier requirements

Brown Trout needs a Aquarium / Exhibit enclosure and accepts the Lakes & Rivers biome. The barrier requirement is none at all, and that is the number to check before building: a Grade 4 animal behind a Grade 1 wall is the most common way a first zoo stalls.

Which animals can live with the Brown Trout?

8 launch species share both a biome and an enclosure type with the Brown Trout, so they are the only candidates for a mixed habitat. Of those, 6 are confirmed group-living by Frontier's own text and 2 are unverified — both are listed rather than presented as equally safe.

Species	Biome	Enclosure	Verdict	Evidence
Blunthead Cichlid	Lakes & Rivers	AquariumExhibit	Likely OK	Blunthead Cichlid “Blunthead cichlids live in large social groups along rocky shorelines, where individuals maintain small feeding territories while…”
Boeseman's Rainbowfish	Lakes & Rivers	AquariumExhibit	Likely OK	Boeseman's Rainbowfish “Boeseman’s rainbowfish is a highly social schooling species that naturally lives in loose but cohesive groups. Social interaction…”
Common Rudd	Lakes & Rivers	AquariumExhibit	Likely OK	Common Rudd “Rudd typically live in shoals (groups), especially when young, which provides protection from predators and improves foraging efficiency.”
Danube Crested Newt	Lakes & RiversWetlands	Exhibit	Likely OK	Danube Crested Newt “Danube crested newts do not have specific social requirements and mainly live solitarily. Provided there is enough space and food, they tolerate other individuals nearby.”
Giant Gourami	Lakes & Rivers	AquariumExhibit	Likely OK	Giant Gourami “Giant gouramis are moderately social: juveniles often shoal together, but adults become more territorial and may not live in close proximity to others.”
West Indian Manatee	EstuarineLakes & RiversMangroveOpen SeaWetlands	Aquarium	Likely OK	West Indian Manatee “Manatees are semi-social. They are likely to gather in groups for feeding and mating, and will interact with others when they meet…”
American Bullfrog	Lakes & RiversWetlands	Exhibit	Unverified	Frontier has not stated a social structure for this species.
Clown Loach	Lakes & Rivers	AquariumExhibit	Unverified	Frontier has not stated a social structure for this species.

Rule: two animals can share an enclosure only when they share a biome and an enclosure type. Likely OK means Frontier's own Social & Reproduction text says both species live in groups; Unverified means the data does not say, so we do not guess. Pair-by-pair table: compatibility chart.

Same biome, but not compatible

3 of the species that accept the Lakes & Rivers biome cannot share an enclosure with the Brown Trout, because one side of the pair is officially solitary. These are the pairings people ask about most, so they are spelled out rather than left as an unexplained gap.

Species	Biome	Enclosure	Why not
African Tigerfish	Lakes & Rivers	AquariumExhibit	African Tigerfish is solitary “African tigerfish are best described as asocial to loosely aggregative predators: juveniles show schooling behaviour, while adults are large…”
Axolotl Deluxe	Lakes & Rivers	Exhibit	Axolotl is solitary “Axolotls are solitary in the wild and are happy living alone in captivity. However, unless different in size, they are content with other ax…”
Giant Slippery Frog	Lakes & Rivers	Exhibit	Giant Slippery Frog is solitary “Giant slippery frogs are solitary and do not interact except to mate or compete over mates.”

Close, but ruled out by enclosure type

3 species share at least one biome with the Brown Trout but use a different enclosure type — a land habitat against an aquarium or a flying aviary — so they cannot be mixed however well the biomes line up.

Common Hippopotamus, Eurasian Beaver, Gharial

Behaviour, size and weight

Brown Trout is classed as Mixed group in Frontier's Social & Reproduction notes: “Brown trout are solitary and territorial fish, but they become more social during spawning events.” On size the game lists no published size for the male. Size and weight together decide the minimum habitat footprint, so use the female figure when you are sizing a breeding pair rather than a display animal.

FAQ

Related

All 130 animals · Full compatibility chart for Brown Trout · Aquarium animals · Aviary birds · Deluxe edition animals · System requirements