The fauna of the Campanet Caves’ ecosystem has been systematically studied for the past couple of years by Mateo Vadell from the Balearic Natural History Museum,whose team includes J. A. Zaragoza from the University of Alicante, R. Jordana and E. Baquero from the University of Navarre, and other Spanish and international specialists. They are compiling a very interesting catalogue of the cave’s fauna; to give an example, a recently-published paper on its biological heritage described the epigeal pseudoscorpion species Chthonius (Chthonius) ischnocheles and Chthonius (Ephippiochthonius) tetrachelatus, plus a species new to science, Chthonius (Chthonius) campaneti ‒ eyeless, its body is a pale chestnut colour apart from the chelicerae, which are reddish chestnut. It is the second hypogeous species of the subgenus Chthonius for Spain.
Some of the other species to be seen in the cave are the carabid beetle Henrotius jordai, whose arrival in Mallorca various authors date in the Pontian Age (Lower Pliocene, Tertiary System). The body of this depigmented predatory species varies in shade from brick-red to dark reddish-brown and is 10-14 mm long, with long, slender antennae, eyeless. It’s an endemic Balearic troglobite which can be found in various caves of the Serra de Tramuntana range, from the locality of Santa Maria del Camí to that of Alcúdia. We can also find the troglophile carabid beetle Laemostenus algerinus, which has a spread-out distribution in the Western Mediterranean and a localized distribution in some Mallorcan caves.
Also on the stalagmitic flowstones one can observe the dipluran Megajapyx espanoli, a predatory and carnivorous subterranean japygid measuring approximately 2 cm. in length. This little creature is a very localized Balearic endemism, since it is cited in only two cave formations of the Serra de Tramuntana, one of which is the Campanet Caves. Japygids are eyeless and they have forceps-like caudal cerci, which they hunt with.
In the gours and the subterranean lake one comes across the aquatic crustacean species Eucyclops serrulatus, Paracyclops fimbriatus, Diacyclops clandestinus, Pleuroxus aduncus, lberobathynella fagei, Parastenocaris, Pseudectinosoma and also mites of the Hydrachnidiae family.