What is a sequential hermaphrodite and why is it important to be aware of sequential hermaphrodites in relation to over-fishing?

A Sequential Hermaphrodite is when an organism (often fish) is born as one sex, but later in life changes sex. Eg Clownfish are born male but the largest becomes female. This is important in fish populations as, if only larger sized fish are caught (for their increased profit margins for fishermen), sex ratios can be greatly disturbed, hindering opportunities for reproduction in the population, often leading to a decline in fish stocks.