Blunthead Puffer and Similar Species
Sphoeroides pachygaster
Got a photo? Identify fish instantly with the Fishby app.
Open the appSeveral fish can be confused with Blunthead Puffer. Here are the key differences.
Species often confused with {name}
Northern Puffer
Sphoeroides maculatus
Key differences: Sphoeroides maculatus typically has small spines covering much of its body, especially dorsally, and often exhibits distinct dark bars or spots on its sides. S. pachygaster is largely smooth-skinned.
Southern Puffer
Sphoeroides nephelus
Key differences: Sphoeroides nephelus has a more elongated body shape and typically possesses small spines on its back and belly. Its coloration often includes more pronounced dark spots and a series of dark bars on the sides, which are generally absent or very faint in S. pachygaster.
Checkered Puffer
Sphoeroides testudineus
Key differences: Sphoeroides testudineus is easily distinguished by its prominent checkered pattern of dark lines and spots on a lighter background, and it typically inhabits shallower, estuarine environments. S. pachygaster lacks such a distinct pattern and is a deeper-water species.
Explore Blunthead Puffer
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.