قِرش جُرح قُرص vs Hare's-tail

Isistius brasiliensis compared with Lagurus ovatus

Key Differences

• قِرش جُرح قُرص is Least Concern while Hare's-tail is Not Evaluated.

Taxonomic Classification

Rank	قِرش جُرح قُرص	Hare's-tail
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum same	Chordata (حبليات)	Chordata (حبليات)
Class	Elasmobranchii	Mammalia (ثدييات)
Order	Squaliformes (قرشيات)	Rodentia (قوارض)
Family	Dalatiidae	Cricetidae
Genus	Isistius	Lagurus
Species	Isistius brasiliensis	Lagurus ovatus

Evolutionary Relationship

قِرش جُرح قُرص and Hare's-tail share a common ancestor at the Phylum level: Chordata. (حبليات)

Conservation Status

قِرش جُرح قُرص

LC — Least Concern

Hare's-tail

NE — Not Evaluated

Physical Characteristics

Attribute	قِرش جُرح قُرص	Hare's-tail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

قِرش جُرح قُرص

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Chile, Norway, and Taiwan.

Hare's-tail

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Africa (South Africa), Asia (India, Japan), Europe (13 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Brazil, Chile, Ecuador).

قِرش جُرح قُرص

The cigar shark, also known as the cookiecutter shark (Isistius brasiliensis), is a small but remarkable shark in the family Dalatiidae, found throughout warm oceanic waters worldwide in tropical and subtropical latitudes. Reaching only 40–50 centimeters in length, it possesses oversized jaws with large, triangular lower teeth arranged in a saw-like series that cut distinctive circular plugs of flesh from much larger prey—including tuna, dolphins, whales, billfish, and even submarine cables and human bodies. It does not kill its prey but instead latches on, rotates its body, and excises a characteristic cookie-cutter-shaped bite. The cigar shark is bioluminescent, emitting a green glow from photophores on its ventral surface that may serve as counter-illumination or to attract prey from below. It undertakes diel vertical migrations, ascending to shallower waters at night and descending to mesopelagic depths during the day. The species is classified as Least Concern by the IUCN, with a vast oceanic distribution and no targeted commercial fishery. It is occasionally taken as bycatch. The geographic epithet brasiliensis refers to Brazil, where early specimens were described, but the species' range is circumglobal in warm oceans. The cookiecutter shark's feeding strategy is one of the most unusual among elasmobranchs.

Shared Countries

Both species can be found in 2 countries:

🇨🇱 Chile 🇳🇴 Norway