The calendar has officially turned to September, and for Animal Crossing, that means a lot. Each month brings new seasonal events, new items, new fish, new bugs and new deep sea creatures. With September officially underway, players can now start collecting new and pricey critters all over their island. Here's what's new this month.New deep sea creatures in Animal Crossing in SeptemberIn the month of September, these deep sea creatures will be arriving for the first time. They can be sold for various amounts of bells or donated to the museum to complete the collection.Oyster- 2,000 bellsTurban shell- 1,000 bellsChambered nautilus- 1,800 bellsUmbrella octopus- 6,000 bellsSweet shrimp- 1,400 bellsThose deep sea creatures can bring in a lot of profit for Animal Crossing players. Unfortunately, these creatures have now left as a result of the month change and are no longer available for catching.Vampire squid- 10,000 bellsSea pineapple- 1,500 bellsThe Vampire Squid, which carries a 10,000 bells price tag, is no longer available after August. Image via NintendoThose sea creatures can no longer be found this month, but will eventually return. All critters in Animal Crossing come and go in cycles, so it's not a permanent exit. However, Animal Crossing players should prioritize these deep sea creatures because they will be leaving after September ends and won't be back for a while.Sea grapes- 900 bellsSea urchin- 1,700 bellsSlate pencil urchin- 2,000 bellsMoon jellyfish- 600 bellsGigas giant clam- 15,000 bellsday 7, caught the Gigas Giant Clam!!!! Isnt it one of the most rare? ☆☆ #AnimalCrossing #ACNH #NintendoSwitch pic.twitter.com/7mgBt3kix0— C (@Skybuddercraft1) August 5, 2020Tiger prawn- 3,000 bellsHorseshoe crab- 2,500 bellsFlatworm- 700 bellsIf bells is what players are looking for, then these deep sea creatures will be the best ones to find. Many of these are available for multiple months, but don't wait around to find out.Gigas giant clam- 15,000 bellsUmbrella octopus- 6,000 bellsGiant isopod- 12,000 bellsTiger prawn- 3,000 bellsI got a tiger prawn!I ain't lion!#acnhscreenshots #acnhquotes #AnimalCrossing #ACNH #NintendoSwitch #SeaCreatures #TigerPrawn pic.twitter.com/HKAjxVtqRX— ACNH.co (@ACNHquotes) July 7, 2020For a complete guide to all critters coming in September, check this list out.