The crazy thing is that practical solutions exist. We don't need to perpetuate these problems. I think our hardest job is to convey a sense of optimism, show how things can get better, and get people to invest in solutions.

We scientists can argue forever about important topics like slightly different flavors of vanilla ice cream. Consider the silliness of this debate: one group of scientists found a 90% decline of big fish and criticized fishery management. Some other scientists found an 80% decline and started a big argument with the 90% people. Who cares if it's 80% or 90%? The real question is whether it's OK to let fishermen take most of the big fish out of our oceans.

My constant fear as a writer as that I will fail to convey the gravity of living. I know that to some degree that sets me up as boorish, but I'll have to live with that, and, honestly, I'd rather err on the side of being "unredeemingly dark," as one reviewer said about blood kin, than on keeping to the sunny side.

We're [Ocean Conservancy group] trying to convince people it's a bad idea to catch fish faster than they can reproduce. That should be a duh, but it's still going on.

Unfortunately, there's a big, bad new bully threatening ocean animals, climate change. We might save fish only to have them starve because of climate change. It seems like the problems just won't stop. That's what got me to quit my cushy University job and take a big pay cut to work on conservation.

Beneath the ocean surface, bad things are happening. Increasing CO2 makes ocean water more acid, and that threatens to dissolve the shells of some ocean animals. Ouch, how'd you like to have your shell dissolve?

Much of the attention on oceans has portrayed oceans as a villain. Warm water strengthened Hurricane Katrina that pounded Louisiana. Rising sea level will flood islands and coastal areas. Or, we're talking about new opportunities like a new shipping lane in the Arctic because of melting sea ice. These may be the obvious problems, but they're probably not the biggest ones.