there is almost no long-term historical record of the salps in any ocean. Few data sets go back more than twenty years, and the ones that do record salps only in these ephemeral explosions of abundance. Scientists only took notice of them when they gathered in such great masses that they made themselves impossible to ignore. Perhaps you would not see salps if they did not form blooms. Many scientists consider salps a nuisance species, because, in swarms, they can take down a fishing net or stop a ship.
