I believe a big reason Somalian pirates get coverage is because they have captured oil tankers (which the disruption of such shipping is obviously a huge concer

I believe a big reason Somalian pirates get coverage is because they have captured oil tankers (which the disruption of such shipping is obviously a huge concern), the ships they are capturing are both massive and carrying good destined for the US/Europe. I believe other pirates in other parts of the world tend to go for smaller ships and don't go for long drawn out ransoms since there's not too many places to safely stash a huge ship.