Planet Zoo 2 Threespot Damselfish — habitat, biome, size & which animals it can live with

Threespot Damselfish is one of the 130 Planet Zoo 2 launch species. It is housed in a Aquarium / Exhibit habitat, accepts the Mangrove / Reef biome, carries a no barrier requirement and is listed at no published size. It shares a biome and an enclosure type with 23 other species, so it can be mixed into a shared enclosure — 14 of those pairings are confirmed by Frontier's own text.

Threespot Damselfish

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

BiomesMangrove / Reef

StatusLeast Concern

Where it lives in the wild
Indian Ocean · Pacific Ocean

Threespot Damselfish at a glance

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

Enclosure and barrier requirements

Threespot Damselfish needs a Aquarium / Exhibit enclosure and accepts the Mangrove / Reef biomes. 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 Threespot Damselfish?

17 launch species share both a biome and an enclosure type with the Threespot Damselfish, so they are the only candidates for a mixed habitat. Of those, 14 are confirmed group-living by Frontier's own text and 3 are unverified — both are listed rather than presented as equally safe.

Species	Biome	Enclosure	Verdict	Evidence
Blacktip Reef Shark	EstuarineMangroveReef	Aquarium	Likely OK	Blacktip Reef Shark “The blacktip reef shark is a loosely social species. They often form groups when hunting prey in order to ‘herd’ schools of fish i…”
Blue and Gold Fusilier Deluxe	Reef	AquariumExhibit	Likely OK	Blue and Gold Fusilier “The blue and gold fusilier is a highly social species that lives in large schools of hundreds of individuals and may mix with othe…”
Clown Anemonefish	Reef	AquariumExhibit	Likely OK	Clown Anemonefish “Clown anemonefish are highly social, living in small, structured groups within sea anemones where they form strict dominance hiera…”
Clown Triggerfish	Reef	Aquarium	Likely OK	Clown Triggerfish “Clown triggerfish are not social fish. They are primarily solitary and territorial, especially as adults. Individuals usually occu…”
Diamondback Terrapin	EstuarineMangroveWetlands	Exhibit	Likely OK	Diamondback Terrapin “Diamondback terrapins will tolerate other nearby terrapins as long as there is plenty of space, and live well together and occasio…”
Golden Trevally	EstuarineReef	Aquarium	Likely OK	Golden Trevally “Golden trevally juveniles are schooling fish, and adults are known to school at times as well, and form aggregations while spawning.”
Humphead Wrasse	Open SeaReef	Aquarium	Likely OK	Humphead Wrasse “Humphead wrasse are generally solitary, although may live in pairs or small groups temporarily for the purpose of breeding.”
Indian Ocean Oriental Sweetlips	EstuarineReef	Aquarium	Likely OK	Indian Ocean Oriental Sweetlips “The Indian Ocean oriental sweetlips lives solitarily, in pairs or in small groups and is not a particularly social species.”
Longfin Batfish Deluxe	Reef	Aquarium	Likely OK	Longfin Batfish “Longfin batfish are social and may be found alone, in pairs, small groups or large schools.”
Ocellated Eagle Ray	EstuarineOpen SeaReef	Aquarium	Likely OK	Ocellated Eagle Ray “Ocellated eagle rays may be solitary or loosely social. They are often seen in groups for the purposes of feeding, breeding and travelling.”
Sailfin Snapper	Reef	Aquarium	Likely OK	Sailfin Snapper “Sailfin snappers are moderately social fish. They are often observed swimming in small groups or loose schools, especially around…”
Schooling Bannerfish	Reef	AquariumExhibit	Likely OK	Schooling Bannerfish “The schooling bannerfish is a shoaling fish and is often found in large groups up to several hundred.”
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…”
Yellow Tang	Reef	AquariumExhibit	Likely OK	Yellow Tang “Yellow tangs form loose social feeding aggregations and may live in close quarters and form spawning groups, but they are not strongly social like schooling fish.”
Bluespine Unicornfish	Reef	AquariumExhibit	Unverified	Frontier has not stated a social structure for this species.
Indo-Pacific Sergeant	Open SeaReef	AquariumExhibit	Unverified	Frontier has not stated a social structure for this species.
Palette Surgeonfish	Reef	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

6 of the species that accept the Mangrove / Reef biome cannot share an enclosure with the Threespot Damselfish, 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
Blackspotted Puffer	Reef	Aquarium	Blackspotted Puffer is solitary “Blackspotted puffers are solitary and territorial, only interacting with conspecifics during the breeding season.”
Giant Grouper	EstuarineMangroveReef	Aquarium	Giant Grouper is solitary “Giant groupers are solitary fish, although they may form temporary aggregations during spawning.”
Great Hammerhead Deluxe	Open SeaReef	Aquarium	Great Hammerhead is solitary “As opposed to some other species of hammerhead, the great hammerhead shark is a solitary animal.”
Hawksbill Turtle	EstuarineMangroveOpen SeaReef	Aquarium	Hawksbill Turtle is solitary “Hawksbill Turtles are solitary and only interact with other individuals to mate.”
Indo-Pacific Leopard Shark	EstuarineMangroveOpen SeaReef	Aquarium	Indo-Pacific Leopard Shark is solitary “Indo-Pacific leopard sharks are usually solitary, but may gather in large groups on occasion for reasons unknown.”
Red Lionfish	EstuarineReef	Aquarium	Red Lionfish is solitary “Red lionfish are solitary but will gather in temporary harems during breeding events.”

Close, but ruled out by enclosure type

2 species share at least one biome with the Threespot Damselfish 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.

Komodo Dragon, Saltwater Crocodile

Behaviour, size and weight

Threespot Damselfish is classed as Mixed group in Frontier's Social & Reproduction notes: “Threespot damselfish adults live in loose aggregates or harems, and juveniles live in small shoals. In areas where there is an abundance of shelter, they may also be solitary and territorial over their area of reef.” 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 Threespot Damselfish · Aquarium animals · Aviary birds · Deluxe edition animals · System requirements