Smoothhounds: Family Triakididae
Species: Galeorhinus zyopterus (Linnaeus, 1758); from the Greek words galeos (a kind of shark), rhinos (nose or snout), zuon, (animal) and pteron (fin-large pectoral fin).
Alternate Names: Tope, oil shark, vitamin shark, snapper shark. Called tiburón aceitoso in Mexico.
Identification: They have a slender body with two dorsal fins, the second much smaller than the first and located nearly over the anal fin (which is about the same size). . They have a large subterminal lobe on the caudal fin (tail) that creates the appearance of a “doubled” tail. They have a long, pointed snout and elongate eyes. Their coloring is dark, bluish or bronze gray above and white below with black on the forward edges of the dorsal and pectoral fins; the caudal fin is usually black tipped with a white spot.. Youngsters, like you sometimes see on piers ,have a white edge on the pectoral fins.
Size: To 6.5 feet and about 100 pounds but most caught from piers are under four feet.
Range: From San Juanico Bay, southern Baja California, and the Gulf of California, to northern British Columbia.
Habitat: Found in both bays and oceanfront water; normally found in deeper parts of bays but frequently in shallower water, especially at night. Tends to feed on fish, squid and octopus.
Piers: An infrequent catch at some San Francisco Bay piers. Best bets: San Francisco Municipal Pier, Berkeley Pier, Elephant Rock Pier, Angel Island Pier, and the Fort Baker Pier.
Shore: Occasionally taken by shore anglers in San Francisco Bay.
Boats: A frequent catch by boaters in San Francisco Bay.
Bait and Tackle: Medium tackle, line at least 20-pound test line, and hooks 2/0 or larger. The best bait is a live midshipman, mudsucker or staghorn sculpin fished near the bottom. Live shrimp, grass shrimp or ghost shrimp, and frozen squid or anchovies will also tempt a few soupfin.
Food Value: A mild flavored flesh suited to several methods of cooking. The best method is probably grilled. It does need to be cleaned properly and kept cool before cooking.
Comments: Never as common as smoothhounds or leopard sharks. Females give birth in the spring to 15-50 young and soon after many of the small pups will be caught by anglers (and hopefully be returned to the water to grow).
Soupfin caught at the Berkeley Pier by Red Fish (Robert Gardner)