Smalltail Shark
Carcharhinus porosus
- Critically endangered
- Card rarity: Legendary
- Sharks and rays

The smalltail shark is a species of requiem shark, and part of the family Carcharhinidae. It is found in the western Atlantic Ocean, from the northern Gulf of Mexico to southern Brazil. It inhabits shallow waters close to shore, particularly over muddy bottoms around estuaries. It tends to swim low in the water column and forms large aggregations segregated by sex. A slim species generally not exceeding 1.1 m (3.6 ft) in length, the smalltail shark has a rather long, pointed snout, a broad, triangular first dorsal fin, and a second dorsal fin that originates over the midpoint of the anal fin base. It is plain gray in color, without prominent markings on its fins.
Classification
- Class
- Chondrichthyes
- Order
- Carcharhiniformes
- Family
- Carcharhinidae
- Genus
- Carcharhinus