As we have posted about previously, the greatest threat to many species of endangered whales is from ship strikes and entanglement in fishing nets. The dead 50′ fin whale that drifted into Boston harbor recently is a reminder of this.  Researchers are not sure how the whale died but extensive bruising suggests that the whale may have become wrapped in some sort of line or cable. A ship strike has also not been ruled out as a possible cause of death. Thanks to Irwin Bryan for passing the news along.