Youngsters try to keep "ocean bubbles" in the air Thursday afternoon during a Kids Make Music class at The Music Man Square, Mason City. The theme of the month-long class was Commotion in the ...

The Ocean Commotion online auction lets you bid on dozens of unique items. The aquarium is offering up the chance to dive into several of their exhibits, and other special items like box seats to ...

Climate change takes habitat from big fish, the ocean’s key predators. Fishermen haul tuna in Santa Maria, island of Sal, Cape Verde, on Aug. 25.

What has happened here really is that we’ve changed the wild ocean. We’ve removed the big fish." More prey and fewer predators could throw the ecosystem out of balance, Christensen says.

This year's marine heat waves and spiking ocean temperatures foretell big changes in the future for some of the largest fish in the sea, such as sharks, tunas and swordfish. Latest U.S.