Sphyma lewini

Shark cartilage powder, prepared from cartilage from the fins of hammerhead sharks (Sphyma lewini) or spiny dogfish Squabis acanthias), is promoted as a treatment for arthritis and cancer (43), based on antiangiogenic properties, but crude extracts are ineffective (44), presumably because the active constituents, such as sphjmastatins are not absorbed. 

Sphyma lewini Scalloped hammerhead Muscle Sinaloa state 2.72 Hurtado-Banda et al. (2012)... 

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