neuromast

SEM image (9,379x magnification) of a Zebrafish neuromast taken near the ear. Katie Kindt false-colored the image taken by Greg Baty.

Katie’s main interest in taking the SEM image was to examine the stereocilia and correlate the result with confocal studies that were performed while the zebrafish was alive. Katie and Gabe Finch at OHSU had a difficult time preparing the fish for SEM, due to the variability in a rapidly growing fish that is three days old. It took an interdisciplinary team effort to produce an image of this quality on a high vacuum XL30 Sirion.

Image courtesy of Greg Baty, Portland State University, Portland, Oregon

The newly discovered species, named Indian spotted coffinfish Chaunax multilepis have been described in a paper published in the journal Zootaxa. 

This bottom-dwelling fish in the sea toad family Chaunacidae was found in the  Andaman Sea at depths of 295–350 m, and off the southwestern coast of India, Arabian Sea.

The specific name multilepis means many scales, in reference to the diagnostic character of four neuromasts (lateral line organs)  on  lower  preopercular  series  of  lateral  line,  compared  with  typically  three  neuromasts  in  all  other members of this species group. 

The Chaunacidae is a group of medium-sized fishes inhabiting the continental slope at depths of up to  2.5 km found in tropical and subtropical oceans around the world.