Two journal articles on fish spawning aggregations:
Colin P.L. 2010 Aggregation and spawning of the humphead wrasse Cheilinus undulatus (Pisces: Labridae): general aspects of spawning behaviour. Journal of Fish Biology 76, 987–1007
Nanami A., Okuzawa K., Yamada H., Suzuki N., Aonuma Y. 2010 Reproductive activity in the checkered snapper, Lutjanus decussatus, off Ishigaki Island, Okinawa. Ichthylogcal Research DOI 10.1007/s10228-010-0155-5
