Gilly admits that very little is known about the squid or its life cycle. .... And they agree on something else: that the animals are spookily intelligent. They've both seen groups of Humboldt coordinating with one another to herd and attack schools of fish, and Cassell once saw one fiddling with the latch of an underwater cage he had just closed. >>They have huge brains for their body size, much larger than most invertebrates," Gilly says. "They might be as smart as a dog."