While nothing can ever really make up for the loss of life and environmental harm, there is a tiny rainbow to this shitstorm: it led to the discovery of new species of fish. See, following BP's monumental fuckup, they formed an organization called the Gulf of Mexico Research Initiative (GoMRI) which would coordinate BP-funded research post-spill. It was very literally the least they could do.
Through this program, scientists have discovered 60 new species of fish never before found in the Gulf, including seven species previously unknown to exist period. Among them are two never-before-seen varieties of squid, a new type of anglerfish, and two new species of "mud dragons," which are -- sadly -- just microscopic sandworms that don't breathe fire. Researchers have also gathered valuable data on the effects of oil spills on the wildlife, ecosystem, the economy, and public health (Guess what? It's bad for all those things). Presumably, they're also using this time to study up on all these newly-discovered species, so we can learn as much as possible before we try to kill them again.
Behold the exciting new species Buttus uglius.