The cookiecutter shark (Isistius brasiliensis), also called the cigar shark, is a species of small dogfish shark in the family Dalatiidae. This shark occurs in warm, oceanic waters worldwide, particularly near islands, and has been recorded from as deep as 3.7 km (2.3 mi).

The cookiecutter shark (Isistius brasiliensis), also called the cigar shark, is a species of small dogfish shark in the family Dalatiidae. This shark occurs in warm, oceanic waters worldwide, particularly near islands, and has been recorded from as deep as 3.7 km (2.3 mi).

Digital pen and ink illustration of a dogfish shark dissection. This section highlight the digestive system. The inset overviews the gill arteries.

Digital pen and ink illustration of a dogfish shark dissection. This section highlight the digestive system. The inset overviews the gill arteries.

Dogfish Shark Dissection: Digestive System by Alexis Hippler, via Behance

Dogfish Shark Dissection: Digestive System by Alexis Hippler, via Behance

Toxic Protein in Parkinson�s Disease Patients Removed by Steroid from Dogfish Shark

Toxic Protein in Parkinson�s Disease Patients Removed by Steroid from Dogfish Shark

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