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Black-face blenny courtship

Male black-face blennies (Tripterygion delaisi) have a brilliant yellow-orange body with a deep black head when breeding. Females blend superbly with their surroundings. Did you spot the female in the cover page image?

 
Photograph 1 of 6

Male and female on 18 June 2014.

 
Photograph 2 of 6

The same couple as in photograph 1, also on 18 June 2014. The male stays close to the female for most of the time and also performs a darting dance around her, which seems to encourage her to lay eggs.

 
Photograph 3 of 6

The same male (I assume) on 24 June 2014. There is now no female and the male's colours are less intense with darker bands showing through the yellow.

 
Photograph 4 of 6

The male is back in full courtship finery on 8 July 2014. The female with him, based on her markings, appeared to be a different individual from the June visitor. She seemed to also lay eggs.

 
Photograph 5 of 6

The couple on 8 July 2014. As well as the brilliant yellow-orange, the black on the male's head is extremely intense. His facial feature are only discernible here because I have deliberately lightened the black in this photograph.

 
Photograph 6 of 6

On 27 July 2014, there is again a female with the male and she appeared to be a further different individual. Given the short time I observed him over the months, this territorial male was impressively successful at wooing visitors. How many partners did he have in total?