Shorefishes of the Tropical Eastern Pacific Online Information System
Updated: 06/12/2008  

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Tetraodontiformes  -  Tetraodontidae  -  Guentheridia  -  Guentheridia formosa

Guentheridia formosa

All Families(148) All Genera(504) All Species(1287)
nasal organ = broad papilla with 2 large holes + cluster small pits
wide & convex between eyes
back & sides - dense dark spots  

  back & belly: skin prickly


Guentheridia formosa (Günther, 1870)

Spotted puffer

Body a heavy elongate oval; head low and broad, notably wider than deep;  wide and convex between eyes;  snout short; nasal organ consists of a low, broad papilla, with 2 large holes and a cluster of small pits on the inside of the papilla; eyes high on sides of head; jaws are a beak composed of 4 fused heavy powerful teeth with a central suture on each jaw; a slit-like gill opening in front of the pectoral fin base; a single short- based dorsal fin at rear of body; a similar-shaped anal fin below the dorsal; no pelvic fins; no spines in the fins;  tail fin bluntly straight, with 10 main rays; tough scaleless skin, body with small spinules, no fleshy skin flaps.

Upper half of head and body dark, paler below; with variable yellowish markings: body with spots in patterns ranging from spots back and upper sides with evenly distributed, variably sized (½ eye to > eye), variably spaced dark spots, sometimes spots arranged or nearly united, in concentric circles, with smallest ring in center of back, all gradations between these two patterns occur; tail dusky, other fins greenish. Juveniles - cross lines on head, concentric rings enclosing rings on back, reticulations on sides.

Size: 26 cm.

Habitat: demersal on coastal soft bottoms, common in estuaries.

Depth: 0-10 m.

Costa Rica to Ecuador.

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