There’s something undeniably charming about a fish that looks like it’s perpetually ready for a photo op. Fish with big lips have a way of standing out in any tank or reef, and whether you’re an aquarist hunting for your next centerpiece or just curious about nature’s stranger experiments, these pouty swimmers are worth knowing. This guide covers 14 species across freshwater and saltwater, with verified photos, sizing data, and tank tips to help you separate the hype from what actually works in a home setup.

4 related posts

Notable species listed: 14 · Stock photos on iStock: 193 · Key examples: Koi, Sweetlips, Carp · Specialized example: Big-lip Damsel (Cheiloprion labiatus)

Quick snapshot

1Confirmed facts
  • Koi, Sweetlips, Carp have big lips per aquarium lists (A-Z Animals)
  • Big-lip Damselfish has fleshy lips for coral feeding (Blenny Watcher)
2What’s unclear
  • No single definitive fish bears the name “big lip fish” exclusively
  • White fish with prominent lips not specifically cataloged in mainstream sources
3Timeline signal
  • Big-lip Damselfish documented in Lembeh Strait, Indonesia, November 2015 (Blenny Watcher)
4What’s next
  • Species range from pond-friendly Koi to reef-only Napoleon Wrasse — match the fish to your setup

The table below summarizes key attributes sourced from aquarium guides and marine biology references.

Attribute Value Source
Species count in top list 14 A-Z Animals
iStock images 193 iStock
Shutterstock images 1115 Alamy
Lip adaptation example Big-lip Damsel eats Acropora tentacles Blenny Watcher
Koi max length 6 feet A-Z Animals
Koi lifespan 40 years A-Z Animals
Sweetlips max length 3 feet A-Z Animals
Napoleon Wrasse scientific name Cheilinus undulatus Aquarium Store Depot
Napoleon Wrasse max length 6.5 feet Aquarium Store Depot
Giant Grouper conservation status Critically endangered iStock

What is the name of the fish with big lips?

No single species exclusively carries the name “big lip fish.” Multiple aquarium guides and marine blogs list various species under the “big lips” descriptor, including Koi, Sweetlips, Napoleon Wrasse, and the Big-lip Damselfish (Aquarium Store Depot). There’s no formal scientific taxonomy grouping these fish together — it’s an informal visual category that spans genera and habitats.

Common names

Several species appear repeatedly across aquarium lists under descriptive common names:

  • Koi — Cyprinus rubrofuscus, known for puckered lips used in begging and bottom feeding (A-Z Animals)
  • Sweetlips — Plectorhinchus genus, reef dwellers with notably thick lips (A-Z Animals)
  • Napoleon Wrasse — Cheilinus undulatus, featuring a pronounced protrusible mouth (Aquarium Store Depot)
  • Big-lip Damselfish — Cheiloprion labiatus, the specialist with fleshy lips adapted for coral feeding (Blenny Watcher)
  • Flowerhorn — hybrid cichlid with prominent lips popular in the aquarium trade (Aquarium Store Depot)
Source context

The species above appear consistently in aquarium guides from A-Z Animals, Aquarium Store Depot, and FishLab, which track aquarium-specific traits rather than formal taxonomy.

Scientific names

When available, scientific names help distinguish species in lists where common names overlap:

  • Koi: Cyprinus rubrofuscus (A-Z Animals)
  • Napoleon Wrasse: Cheilinus undulatus (Aquarium Store Depot)
  • Big-lip Damselfish: Cheiloprion labiatus (Blenny Watcher)
  • Red Snapper: up to 50 cm, Indo-West Pacific distribution (FishLab)

The implication: the “big lip fish” label is a visual shortcut, not a scientific designation, so cross-reference common names with scientific nomenclature to identify species precisely.

What types of fish have big lips?

Big-lipped fish span both freshwater and saltwater environments, with roughly a third of listed species suited for home aquariums and the remainder better suited for large public displays or left entirely in the wild.

Freshwater types

  • Koi (Cyprinus rubrofuscus) — can exceed 6 feet and live 40 years; outdoor ponds recommended over aquariums (A-Z Animals)
  • Common Pleco — big lips adapted for algae scraping (A-Z Animals)
  • Pacu (Piaractus brachypomus) — popular in aquariums with big lips (FishLab)
  • Flowerhorn — hybrid cichlid, 8–16 inches, omnivorous from Southeast Asia (Aquarium Store Depot)
  • Giant Gourami (Osphronemidae family) — suitable for larger aquariums (A-Z Animals)

What this means: freshwater big-lippers skew toward pond setups or large tanks, while most require significant space commitments.

Saltwater types

  • Napoleon Wrasse (Cheilinus undulatus) — grows 3.0–6.5 feet in Indian and Pacific Oceans coral reefs; not available to hobbyists due to size and protected status (Aquarium Store Depot)
  • Giant Grouper (Epinephelus itajara) — critically endangered, features large lips; found in shallow tropical coral reefs (iStock)
  • Sweetlips (Plectorhinchus spp.) — grow over 3 feet, thrive in groups of four or more in dimly lit aquariums with caves (A-Z Animals)
  • Red Snapper — large lips for consuming crustaceans and fish, up to 50 cm (FishLab)
  • Harlequin tusk wrasse (Choerodon fasciatus) — impressive big lips with front teeth (Aquarium Store Depot)
The catch

Napoleon Wrasse and Giant Grouper are protected or critically endangered — hobbyists should not attempt to acquire these species. Check local regulations before any marine purchase.

What is a rare fish with big lips?

The Big-lip Damselfish (Cheiloprion labiatus) stands out as one of the rarest documented species with exaggerated lips. Researchers observed it in Lembeh Strait, Indonesia, in November 2015, noting its distinctive fleshy lips evolved specifically for eating the tentacles of sharp Acropora coral (Blenny Watcher).

Habitat specifics

The Big-lip Damselfish is documented primarily in Indonesian waters, particularly the Lembeh Strait, a renowned muck-diving destination known for unusual marine life. Unlike common aquarium species, it has not been successfully bred or maintained in home tanks — its specialized diet and limited range make it a research subject rather than a hobby fish.

Stock photo libraries show limited but growing documentation: iStock lists 193 images tagged “fish with big lips,” while Alamy provides high-resolution options for editorial and educational use (Alamy). The Big-lip Damselfish remains underrepresented in visual databases compared to common species like Koi or Sweetlips.

The pattern: rare big-lipped species occupy niche tropical reefs and lack the captive-breeding pipelines that supply common aquarium fish, making them unlikely candidates for home tanks regardless of their striking appearance.

What is the fish with lips?

Several fish carry the “lips” descriptor in common names. The Big-lip Damselfish (Cheiloprion labiatus) has developed large fleshy lips that enable it to eat the tentacles of sharp Acropora coral — a feeding strategy not seen in most damselfish (Blenny Watcher).

The name “Big-lip Damselfish” originated from marine bloggers who noted the species’ distinctive “Hollywood lips” as adults, despite its otherwise drab brown coloration. This visual trait made it a curiosity in underwater photography circles.

Other fish with “lips” in their common names include the Sarcastic Fringehead, which has an exaggerated mouth display rather than physically large lips, and various Plectorhinchus species marketed as Sweetlips — named for their prominent, sucker-like mouths.

The trade-off: common names with “lips” are descriptive marketing as much as identification. Verify scientific names before purchasing to ensure you’re getting the species you expect.

14 Fish with Big Lips (Photos and the Best Ones for Your Tank)

This section pulls together the most aquarium-relevant species from current lists, with verified sizing and care notes. Species are grouped by practicality for home setups.

Best for aquariums

  • Koi — 6 feet max, 40-year lifespan; outdoor ponds recommended (A-Z Animals)
  • Sweetlips — 3 feet max; requires groups of 4+ and dimly lit tanks with caves (A-Z Animals)
  • Flowerhorn — 16 inches max; hybrid cichlid, readily available (Aquarium Store Depot)
  • Common Pleco — algae-scraping specialist; big lips adapted for substrate feeding (A-Z Animals)
  • Pacu — big lips in a freshwater setup; popular but requires large tanks (FishLab)
  • Giant Gourami — Osphronemidae family member; suitable for larger aquariums (A-Z Animals)

Why this matters: most “big lip fish” on general lists are either too large for typical home tanks, protected species, or reef-only marine fish. Filtering for aquarium viability narrows the practical pool to Koi for ponds, Flowerhorn for intermediate aquarists, and Pleco/Pacu for specialized freshwater setups.

The upshot

For home aquarists, Flowerhorn and Pacu offer the best balance of accessible care and prominent lips. Koi demand outdoor ponds — if you lack space, they’re not a realistic choice despite their iconic pout.

“Certain types of fish have unique characteristics that are key to their survival in the wild. Check out 14 fish with big, blubbery lips!”

— A-Z Animals, Aquarium Blog

“The Big-lip Damsel, Cheiloprion labiatus, has developed large fleshy lips, enabling it to eat the tentacles of the sharp Acropora.”

— Blenny Watcher, Marine Blogger

Related reading: Fish with Big Lips (Photos) and the Best Ones for Your Tank · Fish with Big Lips

Additional sources

buceplant.com, youtube.com, petmd.com, aquariumcoop.com

When selecting from these 14 big-lipped species for your freshwater or saltwater tank, beginners often start with the best aquarium fish for beginners to build confidence.

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Frequently asked questions

Why do fish like Big-lip Damselfish have large lips?

The Big-lip Damselfish (Cheiloprion labiatus) evolved large fleshy lips specifically to eat the tentacles of sharp Acropora coral. This adaptation lets it feed where other fish cannot, accessing a food source with minimal competition. The trait is specialized and not shared across the damselfish family broadly.

Are Koi suitable aquarium fish with big lips?

Koi can grow to 6 feet and live 40 years, making them pond fish rather than aquarium candidates. Their big lips serve a practical purpose — begging food and bottom feeding with pressure sensors — but they need outdoor space to thrive.

Where are Sweetlips found?

Sweetlips (Plectorhinchus genus) inhabit Indo-West Pacific coral reefs, including Indonesian waters like Lembeh Strait. They thrive in groups of four or more and prefer dimly lit aquariums with plenty of caves. They grow over 3 feet and are best suited for advanced saltwater setups.

What makes Napoleon Wrasse notable for lips?

Napoleon Wrasse (Cheilinus undulatus) has a pronounced protrusible mouth that extends dramatically when feeding. It grows 3.0–6.5 feet in Indian and Pacific Oceans coral reefs. However, it is protected and not available to hobbyists — it belongs in the wild or large public aquaria.

Can Giant Grouper be kept in tanks?

Giant Grouper (Epinephelus itajara) is critically endangered and found in shallow tropical coral reefs. While stock photos show its large lips, it is not appropriate for home tanks. Conservation status and size (up to large adult dimensions) make it unsuitable for private aquarists.

How many images exist of big lip fish?

iStock lists 193 photos tagged “fish with big lips,” while Alamy provides additional high-resolution options. These libraries offer visual verification for the most commonly photographed species like Giant Grouper and Sweetlips, though specialized species like Big-lip Damselfish remain underrepresented.

What is the Big-lip Damselfish?

The Big-lip Damselfish (Cheiloprion labiatus) is a small marine species documented primarily in Lembeh Strait, Indonesia. It develops distinctive “Hollywood lips” as an adult, and its specialized diet of Acropora coral tentacles makes it a research subject rather than an aquarium fish.