Tedania ignis References Tedania ignis species of sponge Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: sponge/ Oxygen uptake and excretion, the tropical sponge Tedania ignis) exude large quantities of mucus, and some species produce toxic substances, which may cause inflammation and skin reactions in humans. Read More, the tropical sponge Tedania ignis) exude large quantities of mucus, and some species produce toxic substances, which may cause inflammation and skin reactions in humans. Read More