As a non-native speaker of English, I may have misinterpreted "shark eyes", thinking that this term denotes cunning or evil looking eyes, which is not how I would describe H's eyes. However, I can attest to him displaying flat, emotionless eyes, eyes that at times look "half-dead" or "dead" to me.
Thinking back on our journey and encounters of the last 2+ years: I'm not sure whether there were shark eyes present at BD1 ("ILYBINLILWY") in August 2014. I recall his eyes and demeanor being vivacious when he told me then that he would move out and date if he could (i.e. financially). BD2 came via email in October 2015 and was preceded by a weekend trip -- yes, I do recall seeing blank, emotionless eyes then. The encounters that followed (Dec. 2015, Feb. 2016, Apr. 2016, May 2016, July 2016, Aug. 2016) were a mixed bag of avoiding eye contact, of emotionless eyes and eyes displaying their usual spark. In Aug. 2016, I saw H's dead eyes, which felt chilling to me.
If I see shark eyes in our next encounter, I will pay attention to whether this occurs in one or both eyes.