Act! Join Us Support Our Efforts
Ocean Conservation Marine Life Species Database Education+Careers Projects Contributors Photos Videos News Connect
pinterest

Tope Sharks, Galeorhinus galeus


Tope SharksTope SharksContribute Photos or VideoContribute Photos or Video

Description & Behavior

Tope sharks, Galeorhinus galeus (Linnaeus, 1758), aka liver-oil sharks, Miller's dogs, oil sharks, penny dogs, rigs, school sharks, snapper sharks, soupfins, soupies, southern topes, sweet williams, tiburons, topers, and vitamin sharks, measure up to 1.93 m in length and weigh up to 45 kg. These sharks are reported to live up to 55 years. Tope sharks have a long, pointed snout, large mouth, and small sharp, blade-like teeth. Their second dorsal fins are close in size to their anal fin. These sharks are gray in color with a white ventral (under) side. Juveniles often have black markings on their fins.

World Range & Habitat

Tope sharks, Galeorhinus galeus, are a widely distributed shark found in: the western Atlantic from southern Brazil to Argentina, in the eastern Atlantic from Iceland to South Africa, the Mediterranean, western Indian Ocean to South Africa, the southwest Pacific in Australia and New Zealand, central Pacific in Hawaii, the eastern Pacific from British Columbia to southern Baja California and the Gulf of California in Mexico.

The tope shark is commonly found near continental shelves, but can also be found in coastal waters and out to waters up to 550 m deep. This species forms small schools that are highly migratory in the higher latitudes of their range.

Feeding Behavior (Ecology)

Tope sharks, Galeorhinus galeus, feed on fishes (bottom as well as pelagic species), cephalopods, crustaceans, echinoderms, and worms.

Life History

Tope sharks, Galeorhinus galeus, are ovoviviparous (fertilized eggs develop in the female) without a yolk-sac placenta. Litter size ranges from 6-52 pups and increases according to the size of the mother. Newborn pups measure 30-36 cm at birth. In Australia, newborns and juveniles aggregate in nurseries found in shallow waters and move into deeper coastal waters during winter after which they return to the nursing grounds. Spawning frequency for the tope shark is once yearly. Ovulation occurs in early summer. The gestation period is about one year.

Conservation Status & Comments

Tope sharks, Galeorhinus galeus, are considered harmless to humans. They are a popular game and aquarium fish and are "hunted" commercially for its meat, liver oil, fins, and for fishmeal. Tope sharks are frequently caught on tuna longlines. Tope sharks are exported to the Asian market for making shark fin soup. In 1937 it was determined their livers were one of the richest natural sources of vitamin A. During World War II soupfins were especially valuable as a source of this necessary vitamin. Prices skyrocketed and and soupfin populations declined dramatically. Following World War II, the synthesis of vitamin A in laboratories reduced the fishing pressure on soupfins.

The tope shark is listed as Vulnerable A2bd+3d+4bd on the IUCN Red List of Threatened Species:

VULNERABLE (VU)
A taxon is Vulnerable when the best available evidence indicates that it meets any of the criteria A to E for Vulnerable (see Section V), and it is therefore considered to be facing a high risk of extinction in the wild.

References & Further Research

Research Galeorhinus galeus » Barcode of Life ~ BioOne ~ Biodiversity Heritage Library ~ CITES ~ Cornell Macaulay Library [audio / video] ~ Encyclopedia of Life (EOL) ~ ESA Online Journals ~ FishBase ~ Florida Museum of Natural History Ichthyology Department ~ GBIF ~ Google Scholar ~ ITIS ~ IUCN RedList (Threatened Status) ~ Marine Species Identification Portal ~ NCBI (PubMed, GenBank, etc.) ~ Ocean Biogeographic Information System ~ PLOS ~ SIRIS ~ Tree of Life Web Project ~ UNEP-WCMC Species Database ~ WoRMS

Search for Tope Sharks » ARKive ~ Ask.com ~ Bing ~ dmoz ~ Flickr ~ Google ~ NatureFootage ~ Picsearch ~ Wikipedia ~ Yahoo! Images ~ YouTube

Feedback & Citation

Start or join a discussion about this species below or send us an email to report any errors or submit suggestions for this page. We greatly appreciate all feedback!


~^~ surface

Help Protect and Restore Ocean Life

Help us protect and restore marine life by supporting our various online community-centered marine conservation projects that are effectively sharing the wonders of the ocean with millions each year around the world, raising a balanced awareness of the increasingly troubling and often very complex marine conservation issues that affect marine life and ourselves directly, providing support to marine conservation groups on the frontlines that are making real differences today, and the scientists, teachers and students involved in the marine life sciences.

Join us today or show your support with a monthly donation.

With your support, most marine life and their ocean habitats can be protected, if not restored to their former natural levels of biodiversity. We sincerely thank our thousands of members, donors and sponsors, who have decided to get involved and support the MarineBio Conservation Society.