Dreaming of a tarantula signifies the presence of a woman in your life who is causing problems. This woman may be interfering with your activities and harming your interests. She has the potential to destroy what you are trying to fix, all while claiming to have no connection to you. If you experience this dream, it may serve as a warning that there is someone around you who is obstructing your progress or peace.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Tarantism" (page 429) â resolved via the equivalent "Tarantula" entry.
A tarantula in a dream represents a loathsome and an evil woman who interferes with people's business and damages their interests, or who destroys what they repair and denies having anything to do with their sufferings. In a dream, this interpretation is based on the legendary nervous disease, formerly believed to be caused by a poisonous bite of a tarantula. Thus, when this harmless hairy spider is seen in a dream, it also could represent a lethal enemy of a fierce sting, scowling, or a despising look. (Also see Spider) Tarawi"h: (arb. See Five times prayers)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.