Parasite 
To dream of a parasite implies low energy and fatigue. You are becoming too reliant on other people. It also suggests your preference to be on the receiving end without giving.
Louse
Please See Lice.
Sponge
To dream of seeing or using a sponge implies that you are open-minded and willing to accept different ideas and viewpoints. The dream may also be a play on the phrase 'sponging someone off.' Perhaps you need to become more self-reliant and prevent others from dictating your life.
Marigold
To dream of marigolds implies that your life will be long, happy, and full of prosperity. You will avoid grave illnesses and hardships.
Barnacles
Dreaming of barnacles implies stubborn thoughts may be persistently bothering you and refusing to shift leaving you feeling frustrated. There is a message of acceptance, relaxation and ultimate victory within a dream of barnacles. Dreaming of barnacles on a boat heralds hints of travel and adventure whereas barnacles on the skin is more inclined to suggest stagnation and the need to forgive and forget.
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