# Button's Banana Slug (*ariolimax buttoni*) Button's Banana Slug (Ariolimax buttoni) is a fascinating and iconic terrestrial mollusk native to the moist, coastal forests of California. Known for their striking, banana-like appearance, these slow-moving invertebrates play a crucial role as nature's recyclers. As dedicated detritivores, they tirelessly comb the forest floor for decaying organic matter, fungi, and animal droppings, transforming waste into nutrient-rich soil that sustains giant redwood ecosystems. Watching a Button's Banana Slug glide gracefully across a mossy log is a testament to the quiet, hidden machinery of the forest. They are beloved symbols of the Pacific coast's damp, old-growth woodlands, capturing the curiosity of hikers and naturalists alike with their vibrant coloration and vital ecological contributions. - **Category:** [Invertebrate](https://www.snappit.app/explore/categories/invertebrate) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 4 - **Habitat:** Found in moist coastal redwood forests, often residing among damp leaf litter, ferns, and decaying logs. ![Button's Banana Slug](https://inaturalist-open-data.s3.amazonaws.com/photos/602049445/medium.jpg) Photo: Ken Clark, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/602049445) ## Appearance This large, fleshy slug is instantly recognizable by its vibrant, mustard-yellow to greenish-yellow coloration, which strongly resembles a ripe banana. Some individuals feature dark brown or black spots scattered across their bodies, making them look like overripe bananas. Measuring between 10 to 25 centimeters in length, they possess a prominent saddle-shaped mantle behind their head, which houses a single breathing hole called a pneumostome on the right side. Their head features two pairs of retractable tentacles: a longer upper pair tipped with eye spots for sensing light, and a shorter lower pair used for feeling and tasting their immediate environment. ## Taxonomy - **Kingdom:** Animalia - **Phylum:** Mollusca - **Class:** Gastropoda - **Order:** Stylommatophora - **Family:** Ariolimacidae - **Genus:** Ariolimax ## Interesting facts - Banana slugs are the second-largest species of terrestrial slug in the world, surpassed only by the Limax cinereoniger of Europe. - Their slime is so unique that researchers have studied it to develop surgical glues and medical adhesives because of its powerful binding properties in wet environments. - They breathe through a single hole on the right side of their mantle called a pneumostome, which they can purposefully open and close to prevent moisture loss. - They have an incredible ability to consume mushrooms that are highly toxic to humans, acting as vital spore-spreaders for the forest's fungal network. ## Special abilities - **Anesthetic Slime Defense:** When threatened, they secrete a specialized, thick mucus that contains a mild anesthetic to numb the mouths and tongues of potential predators. - **Moisture-Regulating Mucus:** Their slime not only helps them glide over rough terrain but also absorbs water from the environment, protecting them from fatal dehydration during dry spells. - **Hermaphroditic Reproduction:** They possess both male and female reproductive organs, allowing any two mature slugs to mate and lay viable eggs, which maximizes their reproductive success. ## Measurements & details - **Length:** 10-25 cm - **Weight:** 0.05-0.11 kg - **Lifespan:** 1-7 years - **Clutch Size:** 20-30 - **Incubation:** 21-60 days ## Diet & Feeding They are essential forest scavengers, feeding primarily on decaying plant matter, fungi, and animal droppings. - **Age differences:** Juveniles eat softer, more easily digestible fungi and tender shoots before transitioning to a broader, coarser detritus diet as adults. - **Primary Foods:** Decaying leaves, Mushrooms and fungi, Animal feces, Mosses, Dead plant matter - **Foraging Method:** Foraging ## Ecological connections - **Eaten by:** Pacific Giant Salamander (*Dicamptodon tenebrosus*) — One of the few predators capable of eating adult banana slugs despite their sticky, numbing slime. - **Eaten by:** Common Garter Snake (*Thamnophis sirtalis*) — Garter snakes will sometimes prey on juvenile banana slugs that are smaller and easier to swallow. - **Consumer:** [Fly Agaric](https://www.snappit.app/explore/fly-agaric) (*Amanita muscaria*) — Banana slugs consume various fungi, including toxic species like the Fly Agaric, without ill effects, spreading their spores throughout the forest. - **Consumer:** [Redwood Sorrel](https://www.snappit.app/explore/redwood-sorrel) (*Oxalis oregana*) — The slug frequently forages among and feeds on the decaying leaves of this common forest floor plant. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Button's Banana Slug? Compare body symmetry, shells, segments, legs, tentacles and how the animal moves. Invertebrates span many unrelated groups, so start with body structure. Invertebrate Identifier: upload a photo and compare the visible details. ### How long is Button's Banana Slug? 10-25 cm ### How much does Button's Banana Slug weigh? 0.05-0.11 kg ### How long does Button's Banana Slug live? 1-7 years ### What does Button's Banana Slug eat? They are essential forest scavengers, feeding primarily on decaying plant matter, fungi, and animal droppings. ### Where is Button's Banana Slug usually found? Found in moist coastal redwood forests, often residing among damp leaf litter, ferns, and decaying logs. ### How does Button's Banana Slug hunt? Foraging ### How many eggs does Button's Banana Slug lay? 20-30 ## Where to spot - [Armstrong Redwoods State Natural Reserve](https://www.snappit.app/guides/places/armstrong-redwoods-state-natural-reserve) — California, US · State Park - [Regional Parks Botanic Garden](https://www.snappit.app/guides/places/regional-parks-botanic-garden) — California, US · Botanical Garden - [Audubon Canyon](https://www.snappit.app/guides/places/audubon-canyon) — California, US · Nature Reserve - [Mendocino Coast Botanical Gardens](https://www.snappit.app/guides/places/mendocino-coast-botanical-gardens) — California, US · Botanical Garden - [Mendocino and Headlands Historic District](https://www.snappit.app/guides/places/mendocino-and-headlands-historic-district) — US · Historic District - [Point Reyes National Seashore](https://www.snappit.app/guides/places/point-reyes-national-seashore) — California, US · National Park [View all places to see Button's Banana Slug](https://www.snappit.app/guides/where-to-see/buttons-banana-slug) ## More Invertebrate - [Coral](https://www.snappit.app/explore/coral) - [Crab Spider](https://www.snappit.app/explore/crab-spider) (*Mecaphesa asperata*) - [Garden Spider](https://www.snappit.app/explore/garden-spider) (*Araneus diadematus*) - [Brown Recluse Spider](https://www.snappit.app/explore/brown-recluse-spider) (*Loxosceles reclusa*) --- Source: [Button's Banana Slug: Facts & Places to See — Snappit](https://www.snappit.app/explore/buttons-banana-slug)