From the story archive · Fictional encounter
Whale watching tour off the California coast. Guide says, "If we're quiet, we might hear the humpbacks singing." Forty tourists standing silently at the rails when—PRRRRRT—a barking spider provides its own marine mammal call.
Without missing a beat, the guide announced, "And that, folks, is NOT a whale, but rather the rarely spotted Pacific Barking Spider." A Japanese tourist recorded it thinking it was an actual whale sound.