Understanding the spatial scale and structure of marine connectivity is essential for uncovering how ocean currents shape gene flow, population structure and larval transport in reef organisms. We examined range‐wide patterns of gene flow and population structure in the tomtate ( Haemulon aurolineatum ), an abundant reef fish with a broad distribution from southern Brazil to Bermuda in the western Atlantic. We used genome‐wide...

The right third arm of the male octopus is the hectocotylized arm. This arm is modified by anatomy specialized to hold and transfer sperm packets to the female, and lacks suckers at the distal end. Male octopus may be distinguished by the skilled eye from their habit of holding their hectocotylus closer to their body in a protective manner, although this observation has never been described quantitatively. We utilized a three-...

Habitat characteristics associated with the giant Pacific octopus, Enteroctopus dofleini (Wülker 1910), were studied in Prince William Sound and Port Graham, Alaska, from beach walk, SCUBA and submersible surveys at depths of 0 to 197 m. Octopus counts on beach walk transects were positively correlated with soft substrates (sand, gravel or broken rubble), the presence of boulders, and dense kelp cover immediately offshore of t...