Discrepancies between potential and observed dispersal distances of reef fish indicate the need for a better understanding of the influence of larval behaviour on recruitment and dispersal. Population genetic studies can provide insight on the degree to which populations are connected, and the development of restriction site‐associated sequencing ( RAD ‐Seq) methods has made such studies of nonmodel organisms more accessible....

Characteristics of the life history of the coral reef‐dwelling cardinalfish Siphamia tubifer , from Okinawa, Japan, were defined. A paternal mouthbrooder, S. tubifer , is unusual in forming a bioluminescent symbiosis with Photobacterium mandapamensis . The examined S. tubifer ( n = 1273) ranged in size from 9·5 to 43·5 mm standard length ( L S ), and the minimum size at sexual maturity was 22 mm L S . The number of S. tubifer...

To determine how each new generation of the sea urchin cardinalfish Siphamia versicolor acquires the symbiotic luminous bacterium Photobacterium mandapamensis , and when in its development the S. versicolor initiates the symbiosis, procedures were established for rearing S. versicolor larvae in an aposymbiotic state. Under the conditions provided, larvae survived and developed for 28 days after their release from the mouths of...