# Largemouth Bass — Facts, Threats & Conservation

*Micropterus salmoides*

> The largemouth bass is a top predator in North American lakes and rivers, named for a jaw extending past the eye. Prized by anglers worldwide, it strikes lures aggressively, grows to 10 kg (22 lb) in rich waters, and has been stocked on every continent except Antarctica for sport fishing.

**IUCN status:** Least Concern  ·  **WARN range:** Africa, Asia, Europe, North America, Oceania, South America

## Quick facts
| Fact | Value |
| --- | --- |
| Scientific name | Micropterus salmoides |
| Diet | Carnivore — fish, crayfish, frogs, and insects |
| Habitat | Warm lakes, ponds, reservoirs, and slow rivers with cover |
| Lifespan | 10–16 years in the wild |
| Weight | 0.5–10 kg (1–22 lb); most caught fish 1–3 kg |
| Top speed | Explosive ambush strikes from cover |
| Conservation status | Least Concern (IUCN) |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Actinopterygii
- **Order:** Perciformes
- **Family:** Centrarchidae
- **Genus:** Micropterus

## Conservation status
- **Status:** Least Concern (IUCN Red List category)
- **Population:** Global population not compiled for this guide
- **Trend:** See the IUCN Red List assessment
- **Assessed:** See the IUCN Red List assessment
- **CITES:** See CITES appendices
- Conservation figures are drawn from the IUCN Red List and CITES; this guide links to the authoritative sources rather than restating population counts.

## Key facts: Largemouth Bass
- Largemouth bass hide among lily pads, fallen timber, and weed beds, exploding forward to engulf prey with a cavernous mouth that gives the species its name.
- Male bass build and defend circular nests in shallow gravel or sand during spring.
- Bass tournaments across the United States draw millions of participants and television audiences.

## Ambush predator
Largemouth bass hide among lily pads, fallen timber, and weed beds, exploding forward to engulf prey with a cavernous mouth that gives the species its name. They are visual hunters, striking artificial lures that mimic wounded minnows, frogs, and worms.

## Nest guarding males
Male bass build and defend circular nests in shallow gravel or sand during spring. They fan silt away, guard eggs against sunfish and crayfish, and protect fry for days after hatching — one of the most dedicated parental behaviours among popular game fish.

## Global sport fishing icon
Bass tournaments across the United States draw millions of participants and television audiences. Stocking programmes introduced largemouth bass to Japan, South Africa, and Europe, where they sometimes disrupt native fish communities in warm still waters.

## Management and ecology
Native and Least Concern in North America, largemouth bass regulate populations of smaller fish and crayfish. Fisheries managers adjust size and bag limits to maintain trophy fisheries. Invasive where introduced outside their native warm-water range.

## What WARN does
WARN does not run a dedicated largemouth bass programme — this guide is part of the World Animal Rescue Network's free educational library. The largemouth bass is currently widespread and not globally threatened, and this guide helps readers understand the pressures that can change that. Building public understanding of species like the largemouth bass supports the broader conservation awareness that underpins WARN's partner-led rescue work across its network.

If clear, science-based wildlife guides like this help you understand and value animals, please consider supporting the World Animal Rescue Network's educational and rescue work so we can keep producing them.

## Frequently asked questions: Largemouth Bass
### How big do largemouth bass get?
Most angler catches are 1–3 kg, but fish over 5 kg are trophies and the world record exceeds 10 kg from a California reservoir.

### What do largemouth bass eat?
Fish, crayfish, frogs, insects, and even small birds or mice near the surface — opportunistic predators that prefer live prey.

### Where are largemouth bass native?
Eastern and central North America from southern Canada through the Great Lakes and Mississippi basin to Florida and northeastern Mexico.

### Largemouth vs smallmouth bass?
Largemouth have a jaw extending past the eye and prefer weedy warm water. Smallmouth bass have a jaw that stops at the eye and favour clearer, cooler rocky streams and lakes.

### Are largemouth bass good to eat?
Yes — firm white flesh is popular in the American South, though catch-and-release sport fishing dominates in many trophy fisheries.

### Where do largemouth bass live?
Largemouth Bass live in Warm lakes, ponds, reservoirs, and slow rivers with cover. The largemouth bass is a top predator in North American lakes and rivers, named for a jaw extending past the eye.

### Are largemouth bass dangerous?
Prized by anglers worldwide, it strikes lures aggressively, grows to 10 kg (22 lb) in rich waters, and has been stocked on every continent except Antarctica for sport fishing. Give wild largemouth bass space; do not corner or handle them.

### How long do largemouth bass live?
Largemouth Bass typically live 10–16 years in the wild. The largemouth bass is a top predator in North American lakes and rivers, named for a jaw extending past the eye. Wild and captive figures can differ; use the sources listed on the guide for the underlying studies.

## Sources
- [IUCN Red List](https://www.iucnredlist.org/)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/bass