Spotted bass vs Smallmouth bass

How to tell them apart, and what follows from getting it right.

Why they get confused

Both are bronze-flanked black bass of moving water with a jaw that stops short of the eye, which is the character most anglers use to rule out largemouth — and having ruled that out, many stop looking.

Spotted bass

Micropterus punctulatus — Centrarchidae

A green-gold black bass photographed side-on in a clear viewing tank, with a broken dark band along the midline, rows of small dark spots below it forming lengthwise streaks on the lower flank, an upper jaw ending level with the back of the eye, and the spiny and soft dorsal fins joined. — Spotted bass (Micropterus punctulatus) from the Ohio River in a photo tank, October 2024. Three characters separate it from a largemouth: the rows of small spots below the lateral line that name the fish, an upper jaw stopping at about the back of the eye rather than well past it, and spiny and soft dorsal fins broadly joined rather than nearly divided. The tail is outside the frame.Nick Tobler (Cowturtle) — CC BY, via iNaturalist — source, licence

Smallmouth bass

Micropterus dolomieu — Centrarchidae

The differences

Each difference is marked with how far it can be trusted on its own. A single diagnostic character settles the identification; suggestive ones only narrow it.

Differences between Spotted bass and Smallmouth bass
Character	Spotted bass	Smallmouth bass	Reliability
Tooth patch on the tongueIdentification	A rough patch of teeth on the tongue, felt with a fingertip.	No tooth patch on the tongue.	Diagnostic on its own
Flank markingsIdentification	Rows of dark spots below the lateral line forming broken horizontal streaks.	Vertical bars rather than horizontal rows of spots, often fading in clear water.	Supporting — use with others
Eye colourIdentification	Eye typically dark, without the reddish cast the other species usually shows.	Eye typically red or reddish-brown.	Suggestive only — varies
RangeRange	Centred on the Ohio and Mississippi drainages, and widely introduced.	Broader native range, extensively introduced worldwide.	Suggestive only — varies

Why it matters

Black bass regulations frequently separate the species, and in several waters a spotted bass carries no protection while a smallmouth does. The tongue patch takes a second and settles it.

The full records

This page compares two species. Each of them has a complete record covering biology, behaviour, handling and the evidence behind all of it.

More about spotted bass

Where it lives, how it is caught, and what else it is confused with.

How it is caught

Drop shottingSpotted bass suspend deeper and over steeper structure than largemouth, and a vertically presented bait held off the bottom is the standard approach to them.

What these connections rest on (1)

Practitioner consensus — 1 connection

Widely and independently recommended by experienced anglers and specialist sources. This is real angling knowledge, not proof: controlled evidence for it is limited, and FishingHQ records it as convention rather than as a demonstrated effect.

Drop shotting
Established angling practice for this species, recorded as convention. The note states the property of the animal or its water that makes the method the answer.
- IGFA International Angling Rules and World Record Requirements — International Game Fish Association (Angling or fisheries organisation)Relied on for: Recognition of the species as an established sport fish and the angling methods and tackle classes conventionally used for it.States this directlyPassage read and verified
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practice connecting this species and method.Background and mechanism onlyCitation checked — the work exists and is described correctly

Gear for this fish

Soft plasticsSpotted bass hold deeper and relate to steeper structure than largemouth, and finesse plastics fished vertically or on a light head are the approach that follows from that.

What these connections rest on (1)

Practitioner consensus — 1 connection

Soft plastics
A practitioner claim about which lure family answers this species' feeding or holding behaviour.
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated North American lure practice for this species.Background and mechanism onlyCitation checked — the work exists and is described correctly
- IGFA International Angling Rules and World Record Requirements — International Game Fish Association (Angling or fisheries organisation)Relied on for: Recognition of the species as an established sport fish taken on artificial lures, and the tackle conventions used for it.States this directlyPassage read and verified

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Reviewed 2026-08-10. FishingHQ does not state what any rule is or where any rule applies. Where this page says the two species are managed differently, that is a reason to check the authority for the water you are on — not a statement of what it requires.