''Sphoeroides angusticeps'', known as the narrow-headed puffer, is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of pufferfish in the family

Tetraodontidae Tetraodontidae is a family of primarily marine and estuarine fish of the order Tetraodontiformes. The family includes many familiar species variously called pufferfish, puffers, balloonfish, blowfish, blowies, bubblefish, globefish, swellfi ...

. It is a tropical marine species

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to the Gálapagos Islands, where it occurs at a depth range of 5 to 18 m (16 to 59 ft). It reaches 25 cm (9.8 inches) in total length. The species is thought to be

diurnal Diurnal ("daily") may refer to: General * Diurnal cycle, any pattern that recurs daily ** Diurnality, the behavior of animals and plants that are active in the daytime * Diurnal phase shift, a phase shift of electromagnetic signals * Diurnal tem ...

, hovering just above the substrate by day and burying itself at night.

References

Tetraodontidae {{Improve categories, date=January 2022