1991, with the assistance of the DRASM vessel, the Archéonaute. It was conducted by Jean Courtin, a French prehistorian and experienced diver, and Jean Clottes, a French specialist in cave art. When the discovery was announced, doubts were raised about the authenticity of the figures. Various French prehistorians, such as Brigitte and Gilles Delluc or Denis Vialou, expressed reservations. In June 1992, a new mission allowed, among other things, the shooting of a film entitled "The Secret of the Cosquer Cave". From 2001 to 2005, five programmed archaeological research operations were organised under the responsibility of Luc Vanrell (IMMADRAS (Société de travaux sous marins) / DRAC PACA / LAMPEA (LAboratoire Méditerranéen de Préhistoire Europe Afrique)), then five others from 2010 to 2015 (no operation in 2012) under the same direction, with the collaboration of Michel Olive (DRAC PACA / LAMPEA). The Ministry of Culture and Henri Cosquer are involved in a dispute, which is based on the law on preventive archaeology of 17 January 2001, which grants the inventor compensation – a lump-sum payment or a thirty-year profit-sharing scheme – paid by the operator on the basis of the evaluation of the archaeological interest of the cave. Henri Cosquer also claimed a reward and the recovery of part of the proceeds from the sale of books of photographs of the cave. Prehistoric paintings Four fifths of the cave, including any cave wall art, were permanently or periodically submerged and destroyed by sea water. Nearly 500 instances of cave art remain which date back to two distinct periods during the Upper Paleolithic. The first phase, from around 27,000 years BP (the Gravettian Era), is represented by art consisting of 65 hand stencils, 44 in black and 21 in red. Art from the more recent period dates to 19,000 years BP (the Solutrean Era) and features much more complex depictions of various animals and human figures. In total there are 177 animals drawings found in the cave these include 63 horses, 28 ibex, 17 deer, 10 bison, and 7 aurochs. There is also the more unusual depiction of 16 marine animals including 9 seals and 3 great auks as well as some jellyfish and various figures which could be either fish or ceteceans. Of the human figures there are numerous sexual symbols but also one example of "the killed man" motif which can be seen in other caves such as at Lascaux.