The submission deadline for National Geographic's annual Photo Contest is still a month away, but this year's competition is already swarming with spectacular entries from photographers around the world.

The deadline for submissions is October 31st, and winners' names will be available online after November 30th ( see here for Ts and Cs). In the meantime, here are a few of our favorite images from this year's growing collection of entries.

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Blue Ghost Fireflies in Brevard, North Carolina. Blue Ghost fireflies are unique because they stay lit and only hover about a foot off the ground. | Photo & Caption Credit: Spencer Black/National Geographic Photo Contest

Yosemite National Park, seen from Glacier Point. This was taken at 3am with a 1 minute exposure showing Half Dome and the fire that was raging in the valley behind it. |Photo & Caption Credit: Judge Helbig/National Geographic Photo Contest

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This picture show a genuine Industrial Diver System [from the late 1800s]. It is part of the collection of an old retired diver who worked during the 1950s with this equipment in Lake Geneva.The equipment weighed 140 pounds and more air is supplied by a pump activated manually by two persons.The equipment is preserved in its original condition and works perfectly. This allowed us to try it in real conditions and achieve this photo. | Photo & Caption Credit: Mark Henauer/National Geographic Photo Contest

Glass eel fishing season starts in Japan in the winter. Hunters illuminate the water with a mercury lamp from onboard and scoop up eel fry gathering in the light with a small net. During the new moon, hunters search for glass eel and wander about with many lights in the estuaries. | Photo & Caption Credit: Yusuke Sakai/National Geographic Photo Contest

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On the coast of Tenerife in the Canary Islands, we have quite the selection of affectionate green turtles (Chelonia mydas). I find myself devoting much time to these curious creatures. This turtle was coming from the surface with the sun behind it, and the sun rays surrounding it gave it a special majesty. | Photo & Caption Credit: Montse Grillo/National Geographic Photo Contest

Pegadung Rock known as rock screen (Batu Layar) and Shark Teeth (Gigi Hiu) because the shape of the cluster of rocks resembling shark teeth. | Photo & Caption Credit: Henry Adam/National Geographic Photo Contest

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When the Mediterrenean Mantis opened its wings, It seemed very impressive at the sunshine ... | Photo & Caption Credit by Hasan Baglar/National Geographic Photo Contest

I'd gone to Big Sur to watch the gray whale migration from the cliffs, but it was too foggy to even see the water. I decided to hike up the Baronda Trail to see if I could get above the fog. This view was my reward. Miles of lupine and blue skies. Outstanding! | Photo & Caption Credit: Douglas Croft/National Geographic Photo Contest

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Two Polar bear cubs full of adrenaline on iceflow in Svalbard. The mother was just trying to have a quiet stroll but the cubs were not having any of that. This was the male cub and he just was so entertaining to watch. | Photo & Caption Credit: Colin Mackenzie/National Geographic Photo Contest

Capturing this gentle giant's inquisitive nature was rather easy as he swam right up to us and just stared for several long seconds. I love all the bubbles and his cute little face. | Photo & Caption Credit: Misty Gage/National Geographic Photo Contest

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