Hanging out on boulders at a -5 tide. Not common, but I seem to find at least one of these trophons at every big low tide.
This large intertidal trophon is a mystery to me. I've found it three times this month, and cannot seem to ID it. It seems to commonly have a commensal red-banded scaleworm, Arctonoe vittata, which I also see on sea stars.
I call this my "mystery trophon" - I see them reasonably often in the low intertidal, with quite eroded and highly sculptured shells, about 4 cm long. Can't figure out what they are, though. Poking around at a -5.3 tide -- first big low tide of the spring.
I have posted several similar trophons of the low intertidal, with several different IDs, and have yet to be convinced they are different species, or that any of those 3 IDs is correct. https://www.inaturalist.org/observations/6019253
https://www.inaturalist.org/observations/4072603
https://www.inaturalist.org/observations/4125626
SeaTube URL of ROV video and audio: https://dmas.uvic.ca/SeaTube?resourceTypeId=1000&resourceId=23543&diveId=2651&time=2018-07-15
>>NOTE: please click the link then COPY-PASTE the following timecode to the end of the URL: T22:21:47.000Z