A couple IDs from Alki Junkyard please

Fish & Invertebrate sightings and descriptions, hosted by resident NWDC ID expert Janna Nichols (nwscubamom).
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Scubie Doo
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A couple IDs from Alki Junkyard please

Post by Scubie Doo » Sun Jan 19, 2020 9:39 am

Hello,

I'm looking for help with a couple IDs. The first what seems to be a variation of a skeleton shrimp. This critter was tiny, belle is one photo next to a much stick, which is not very big in diameter. I tried to get different angles, but it was moving around pretty swiftly too.

The second floated by me and I thought it was a tiny stubby squid due to the color. However, It was so small, I could not tell. I only got (3) shots, but not sure what it is.

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And for good measure, here is a Opossum Shrimp. I've never been able to capture one of these before :-)

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Jan K
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Re: A couple IDs from Alki Junkyard please

Post by Jan K » Sun Jan 19, 2020 10:15 am

WOW on the first critter !
As for the second one, it could be a slug, Diomedes' Aglaja, I found one floating by too...
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Jan K
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Re: A couple IDs from Alki Junkyard please

Post by Jan K » Sun Jan 19, 2020 10:23 am

I looked on the internet, your first critter might be Podocerus cristatus Amphipod
https://www.reeflex.net/tiere/12271_Pod ... status.htm

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Vjw
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Re: A couple IDs from Alki Junkyard please

Post by Vjw » Sun Jan 19, 2020 1:48 pm

Wow! Cool finds, Jesse! :joshsmith:

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Scubie Doo
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Re: A couple IDs from Alki Junkyard please

Post by Scubie Doo » Sun Jan 19, 2020 1:51 pm

Jan, thanks. You may be right. I think you are correct on the slug. That’s what is was thinking too.

The first one really looked like a skeleton shrimp. It has the two claws and was “standing up” like a skeleton shrimp.


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Jan K
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Re: A couple IDs from Alki Junkyard please

Post by Jan K » Sun Jan 19, 2020 2:16 pm

Maybe Greg can help out on that shrimp. Great shots !

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Re: A couple IDs from Alki Junkyard please

Post by Scubie Doo » Sun Jan 19, 2020 6:56 pm

Thread has officially been high jacked. hahaha :)

Greg- Can you help with the ID, I think Jan is correct that it is an isopod. The front claws had me wondering though. If you want high-res pics let me know and I can send them.


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Greg Jensen
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Re: A couple IDs from Alki Junkyard please

Post by Greg Jensen » Mon Jan 20, 2020 3:23 pm

It's an amphipod- on page 219 of one of my books, which I can't name here due to the 'no advertising' rule.
It has generally been referred to as Podocerus cristatus, but it is not that species (from New Zealand) and work is currently underway to determine if the ones on our coast are a complex of species or just one that is highly variable in coloration.

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A couple IDs from Alki Junkyard please

Post by Scubie Doo » Mon Jan 20, 2020 5:20 pm

Greg Jensen wrote:It's an amphipod- on page 219 of one of my books, which I can't name here due to the 'no advertising' rule.
It has generally been referred to as Podocerus cristatus, but it is not that species (from New Zealand) and work is currently underway to determine if the ones on our coast are a complex of species or just one that is highly variable in coloration.
Greg- you’re the man! Thank you very much. It sure was cool, I had never seen one before. Well, maybe I have, but never noticed before. It was bright and stopped me in my tracks :) Do you know what depths they are typically seen at?


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Greg Jensen
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Re: A couple IDs from Alki Junkyard please

Post by Greg Jensen » Mon Jan 20, 2020 9:27 pm

The ones I've seen have always been shallow (15-30 ft). Supposedly have been found as deep as 300+ ft but with the uncertainty of the i.d. it's hard to say if it is the same beast. They come in some amazing colors- one looks just like the Spanish shawl nudibranch. It's been suggested that they are nudibranch mimics since fish leave nudies alone.

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Re: A couple IDs from Alki Junkyard please

Post by Scubie Doo » Mon Jan 20, 2020 10:23 pm

Very cool Greg. Thanks for the additional details.


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