Every month in Animal Crossing, certain critters leave and are replaced by new ones. All critters, whether they are sea creatures, fishes or bugs, have a set time when they spawn in the game. The exodus of critters is more drastic when seasons end, and that's what is happening now.September is the last summer month and October is the first fall month, meaning a lot of critters will be leaving when summer officially ends, but new ones will be arriving as well. With September almost over and October just over the horizon, here's a list of what critters will be arriving when the calendar flips over.All Animal Crossing October arrivalsHere are all the fish that will arrive on October 1. There aren't a lot of new fishes coming in, but they still represent an opportunity to complete the museum's collection if players haven't already done so.Yellow perch- 300 bellsDab- 300 bellsDab, a fish arriving in October for New Horizons (Image via Nintendo)One new insect is arriving in October and it is:Ladybug- 200 bellsLadybugs will be making their return to Animal Crossing: New Horizons very soon. Here are all the deep sea creatures that will begin spawning when October arrives.Seaweed- 600 bellsSpiny lobster- 5,000 bellsVenus' flower basket- 5,000 bellsfranz@franzanthThey put Venus' flower basket sponge WITH SHRIMPS INSIDE THEM #AnimalCrossing #ACNH #NintendoSwitch1:10 AM · Jul 3, 202025541They put Venus' flower basket sponge WITH SHRIMPS INSIDE THEM #AnimalCrossing #ACNH #NintendoSwitch https://t.co/4N4lKjUBBKThese deep sea creatures give Animal Crossing players an opportunity to make some bells, as the spiny lobster and the Venus' flower basket are the most expensive critters arriving this month. Additionally, these aren't just arriving in October, but players can also find these critters to fetch them quite a few bells.Umbrella octopus- 6,000 bellsMahi-mahi- 6,000 bells (leaving after October)Golden trout- 15,000 bellsSturgeon- 10,000 bellsGiant isopod- 12,000 bells (leaving after October)Ranchu goldfish- 4,500 bellsSnapping turtle- 5,000 bells (leaving after October)Barred knifejaw- 5,000 bellsGiant trevally- 4,500 bells (leaving after October)Banded dragonfly- 4,500 bells (leaving after October)Scorpion- 8,000 bells (leaving after October)Taylor 🦊💜@JostinTaylorBeing from Hawaii, the Mahi, Ahi (Yellowfin Tuna) and the Ulua (Giant Trevally) will always be some of my favorite fishies in Animal Crossing6:06 AM · May 3, 20205Being from Hawaii, the Mahi, Ahi (Yellowfin Tuna) and the Ulua (Giant Trevally) will always be some of my favorite fishies in Animal Crossing https://t.co/OdumfxvSwgBarelleye- 15,000 bellsCoelacanth- 15,000 bellsCollecting critters can be a great way to make bells in Animal Crossing: New Horizons.