Recommended servings per month
|Contaminant||Men||Women||Kids 6-12||Kids 0-5|
|Spiny dogfish||Mercury||< 1||0||0||0|
|Longfin mako||Mercury||< 1||0||0||0|
|Blacktip shark||Mercury||< 1||0||0||0|
|Common thresher shark||Mercury||< 1||0||0||0|
|Shortfin mako (HI, CA)||Mercury||< 1||0||0||0|
Most shark species are severely depleted. The main reasons for their precipitous decline are:
- They are caught accidentally by the thousands and discarded as waste by tuna and swordfish longline fishers.
- There is strong demand for their fins in Asia.
- Most sharks mature slowly and have few offspring.
Spiny dogfish are especially vulnerable to overfishing, since they have the longest gestation period of any vertebrate (two years).