Large male at western cleaner clingfish station (WCC not in view) under rock reef ledge depth 6m. Note ulcerating lumps on head. I don't know the cause. Possibilities might include:
1) some kind of microbial infection e.g. tuberculosis
2) parasitism
3) healing trauma e.g. spear-fisher's wound
The mature male swam normally back and forth along this long wide ledge but seemed very keen to spend time at the cleaning station and repeatedly returned to it whenever I backed off with my camera