Mark they are fairly large for anthias about 4 inches at the moment bigger than squampinnis. they have great colour especially the dominant male at dusk they do spawning dances and the color changes as the male gets a intense red bar on his side and his tail edge.
I have seen rival males mouth sparring almost like rams butting heads but they are not overly aggressive in my aquarium as it is large and they seem more placid than the lyretail anthias
I have them with squampinnis and no problems.
here some pics
<a href="http://www.flickr.com/photos/42085951@N06/4202971994/" title="DSC_0120_edited by Kinlayan, on Flickr"><img src="http://farm3.static.flickr.com/2509/4202971994_840aa7f9bf.jpg" width="500" height="332" alt="DSC_0120_edited" /></a>
<a href="http://www.flickr.com/photos/42085951@N06/4202216263/" title="DSC_0123_edited by Kinlayan, on Flickr"><img src="http://farm3.static.flickr.com/2765/4202216263_6c3e1ec6af.jpg" width="500" height="332" alt="DSC_0123_edited" /></a>
<a href="http://www.flickr.com/photos/42085951@N06/4202795538/" title="DSC_0028_edited by Kinlayan, on Flickr"><img src="http://farm3.static.flickr.com/2559/4202795538_736fa021ce.jpg" width="500" height="332" alt="DSC_0028_edited" /></a>
<a href="http://www.flickr.com/photos/42085951@N06/4202041953/" title="DSC_0031_edited by Kinlayan, on Flickr"><img src="http://farm3.static.flickr.com/2649/4202041953_c6f35d77a0.jpg" width="500" height="332" alt="DSC_0031_edited" /></a>
<a href="http://www.flickr.com/photos/42085951@N06/4202051141/" title="DSC_0035_edited by Kinlayan, on Flickr"><img src="http://farm3.static.flickr.com/2630/4202051141_c7e9126904.jpg" width="500" height="332" alt="DSC_0035_edited" /></a>