NBC News So what are these mysterious sea dwellers and what does their appearance mean?

Stuff to Blow Your Mind Our Howstuffworks design team came up with this cool animated summary of some of the weirdest creatures in the sea.

NPR Wondering what kind of bird delivers your early morning wake-up call? Or which frogs are croaking and lurking in your backyard pond? Use your smartphone or a tape recorder to capture sounds of the mysterious creatures in your backyard (at least 15 se Read more ... conds) and send the audio file to nprcrowdsource@npr.org with the subject line "Decoding Nature." We’ve enlisted the help of researchers at the Cornell Lab of Ornithology to help decode your sounds and identify the creatures. Make sure to include your full name and where you live in your email. And if you’d like, share your best guess as to the identity of your mysterious, noisy neighbor.

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)

Amazing world Pictures These Mysterious Creatures Appeared Overnight And They’re Both Creepy And Awesome (07 Photos)