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Fish Saltwater Care: medium Semi-aggressive

Saddleback Clownfish

Amphiprion polymnus
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Other names: Saddleback anemonefish, Polymnus
Group: Marine fish · Family: Pomacentridae · Origin: Western Pacific — from Indonesia and the Philippines to southern Japan, New Guinea and the Solomon Islands

A clownfish with a head bar and a saddle-shaped white patch extending to the dorsal fin on its dark brown body. It lives in sandy lagoons; wild specimens are delicate, and it is kept as a single pair.

Will it suit my tank?

Last updated October 16, 2026

Temperature
24–27°C
pH
8.1–8.4
Adult size
12 cm
Minimum tank size
110 liters
Lifespan
8–20 years
Social structure
Pair
Group
at least 2
Male–female ratio
1 çift (büyük birey dişi olur)
Swimming zone
Middle
Diet
Omnivore
Breeding
Substrate spawner

Water parameters

Temperature24–27°C
pH8.1–8.4
Recommended range
Considered reef safe

Overview

October 16, 2026 · Suggest an edit

The saddleback clownfish is recognized by its dark brown-black body, orange-yellow snout and chest, the white bar behind the head and the saddle-shaped white patch extending from the middle of the back onto the dorsal fin. In the wild it lives in sandy and muddy lagoons rather than on coral reefs, in Heteractis crispa and Stichodactyla haddoni anemones. Wild-caught specimens are sensitive to shipping and disease; if a captive-bred specimen is available, choose it.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 110 liters for a pair.
  • Salinity specific gravity 1.023–1.026, pH 8.1–8.4, temperature 24–27°C.
  • Reef-safe; it leaves corals and invertebrates alone.
  • An anemone is not essential; its natural hosts are anemones that live on sand bottoms and are difficult to keep in the aquarium.
  • A calm layout with a sand substrate suits this species.

Diet

October 16, 2026 · Suggest an edit

Omnivorous. Offer granule food, frozen mysis, brine shrimp and copepods; feed small amounts twice a day.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

A pair defends its nest, but overall its territoriality is moderate. Clownfish are born male, and the larger fish of the pair turns into a female. Keep a single pair in the aquarium; do not add other clownfish species.

Good companions: Gobies, cardinalfish, blennies, chromis, cleaner shrimp.

Avoid: Other clownfish species, aggressive damsels, predatory fish.

A short profile for this species

The Saddleback Clownfish page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026