100 Creepy-crawlies to Find in a Dungeon

Dungeons and caves can be home to all kinds if insects, arachnids and similar types of creepy-crawlies, including those that fly. In a fantasy setting, some of these may have become definitely strange. This supplement has 100 such creepy-crawlies for characters to encounter. Some are useful, some are dangerous and some are just odd. They can be used to help bring a dungeon's environment to life.

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• Foghorn: Sometimes dungeon rooms, caves and caverns can have a low-lying bank of mist or fog swirling about the floor, and this can indicate the presence of foghorns in large numbers. The insect is horn shaped and absorbs moisture from the environment, which is then emitted out of the bell of the horn as fog. A single foghorn will just emit a few pale wisps of fog, but a large nest of them can fill a room up to a couple of feet deep in swirling fog. The fog makes it hard for predators to find the foghorns, though the insects themselves seem to have no problem navigating through fog.
• Fungal Mite: The fungal mite is a very tiny insect that can cause a great deal of trouble. It is a parasitic insect that feeds on mushrooms and other fungi and a plague of the mites can quickly destroy large amounts of fungal growth. Perhaps not so great a problem for some, but fungi of different types are useful in the underearth realms as a source of food and other useful materials, and an outbreak of fungal mites can render entire crops of such fungi unusable. Signs of an outbreak tend to be treated very seriously by the underearth civilisations.
• Fungus Bug: Fungus bugs don't feed on fungi, nor do they resemble them in most ways. Instead, they are a cross between an insect and a fungus, as a fungal infection has colonised an insect and has a degree of control over it. Ut's not clear whether this fungal infection is a symbiote or a parasite; unlike some fungal infections, this one doesn't appear to harm the colonised insect in any way, which does lend towards a symbiotic relationship. Fungal bugs look almost like an ordinary insect, but do have several fungal tendrils poking out of their exoskeleton.
• Gem Bug: Gem bugs are a range of insects that are all the same species but have wildly differing appearances. Gem bugs look like different types of gemstones, which is why their appearance varies, and they appear like cut gemstones as well, which are very attractive to many creatures who will then pick them up. Gem bugs are rarely found in large treasure hoards for the simple reason that the insects eat them. Gem bugs are often placed with other valuable items, and they will slowly and steadily eat precious metals and other gems.
• Giant Boring Worm: The giant boring worm isn't as large as might be thought from the name, but it is large for a creature that otherwise looks like an ordinary earthworm, being several feet long and looking similar to a snake until more closely observed. An area where giant boring worms are active is recognisable by the holes with mounds of detritus next to them, similar to earthworm mounds that might be found on the surface. The primary difference between a giant boring worm and an earthworm, apart from the size, is that the giant boring worm can bore through rock. They are sometimes used in low-effort mining, for their mounds can contain valuable minerals.

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