In this study, the authors report the first record of egg masses deposited in solitary tunicates by the snubnose sculpin, Orthonopias triacis , from the Northeastern Pacific. Four egg masses were discovered in the tunicate Ascidia ceratodes that were genetically determined to be O. triacis . Female O. triacis had long ovipositors that allow deposition of their eggs inside the atrium of the tunicates. A comparison of host‐tunic...

Summary To date, six candidate genera of anaerobic ammonium‐oxidizing (anammox) bacteria have been identified, and numerous studies have been conducted to understand their ecophysiology. In this study, we examined the physiological characteristics of an anammox bacterium in the genus ‘ C andidatus J ettenia’. Planctomycete KSU ‐1 was found to be a mesophilic (20–42.5°C) and neutrophilic ( pH 6.5–8.5) bacterium with a maximum g...