Related FAQs: Pistol Shrimps 1, Pistol Shrimps 2, Alpheid ID, Alpheid
Behavior, Alpheid Compatibility,
Alpheid Selection, Alpheid Systems, Pistol Shrimp and Goby Biotopes,
Alpheid Feeding, Alpheid Disease, Alpheid Reproduction, & Cleaner Shrimps
Shrimps 2, Coral Banded
Shrimp, Dancing Shrimp,
Harlequin Shrimp, Saron Shrimp, Shrimp Identification, Shrimp Selection, Shrimp Behavior, Shrimp Compatibility, Shrimp Systems, Shrimp Feeding, Shrimp Reproduction, Shrimp Disease,
Crustacean Identification, Crustacean Selection, Crustacean Behavior, Crustacean Compatibility, Crustacean Systems, Crustacean Feeding, Crustacean Disease, Crustacean
Related Articles: Shrimps,
A Few Common Shrimps for the Marine Aquarium by James W.
Fatherree, Shrimp Gobies, Stenopus
hispidus/Coral Banded Shrimp, Dancing Shrimp, Harlequin Shrimp, Saron Shrimp, Periclimenes holthuisi Pix, Biological
/A Diversity of Aquatic Life
Family Alpheidae, Pistol Shrimp
Seldom seen, often heard... and the results of their
"shooting" known far and wide... the Alpheids can be easily
identified (if you can find them) by their very short eye stalks and
one much larger "pistol" claw. This specialized
appendage is capable of punching holes in all crustacean exoskeletons,
even many shellfish! Alpheus and Synalpheus species are the notable
symbionts with Shrimp Gobies.
Pistol Shrimp are the predominant crustaceans on the world's
reefs... and so you are likely to run into them... they eat most all
types of foods... and if kept fed will often leave other crustaceans
and mollusks alone. See happily fed specimen above in title bar.
|Snapping Shrimps, family Alpheidae. Noted
for their noise making capacity, myths re the power of their large
claw (a .22 caliber, tank-cracking...) and commensal to mutualistic
relationships with fishes (mainly Gobies) and
|Synalpheus stimpsonii (Man
1888). White body with varying dark markings. A crinoid
(Comanthina, Oxycomanthus) commensal that often displays
contrasting color to its host. East Indo-West Pacific; Singapore,
Thailand, Indonesia, Japan, Australia. N. Sulawesi pix.
|Seen this in the wild? An apparent tunnel through a stony
coral, in this case a Montipora? There is/are Alpheid/s living in
the formed (by them) tunnel complex.
|Unidentified Alpheid in a crinoid. N. Sulawesi pic.
Yes, it really is THIS red!
Possible Help in Identification, Alpheid --
<Hi Deana, Lynn here today.>
Hope you are having a good day.
<I'm having a great day, thanks, and same to you!>
I had an idea about the identification of one of the pistol
shrimps marked as unidentified.
The caption reads "Unidentified Alpheid in a crinoid. N.
Sulawesi pic. Yes, it really is THIS red!".
<Ah yes, I know this photo.>
I believe I have the answer (but of course could be wrong). I
think it is actually a Feather Star Squat Lobster, Allogalathea
elegans, (or very close relative). It seems to be nestled in a
Feather starfish. These particular lobsters reach about 1 1/4 in
and form a symbiotic relationship with this particular starfish
even changing their colors to blend with it.
<Yes, while most individuals in this species show marked light
and dark bands running the length of the back/carapace, there is
an exception. That is, an all-red version that lives on red
hosts. Pretty cool, huh?>
They hide within their arms. I remembered seeing a pic almost
exactly like this and went back to my books. *Encyclopedia of
Aquarium and Pondfish* by David Alderton, ISBN 978-0-1566-3678-4,
published 2008, lobster, pg291, starfish pg297. Don't know if
I'm right, but, your site is all about gathering knowledge
and this is just too cool a species (if that's what it is),
for hobbyists not to know about.
<It is indeed an extremely cool species and we very much
appreciate your interest and help. I particularly appreciate it
because I know the time and effort it takes to research these
neat little creatures! In this case, though, the shrimp in
question really does appear to be some sort of Alpheid. You can
tell by the large Popeye-worthy claw arm and distinctively
shaped/rounded claw. Allogalathea elegans has long slender arms
with slender claws. Beyond that though, the two do indeed look
very similar, given what you can see in the photo. Here's a
good example of an Alpheid arm and claw.
That thing looks like it would make a good can-opener,
doesn't it! >
This is the link with the "unidentified" shrimp.
http://www.wetwebmedia.com/pistolshrimps.htm Hope you guys are
<I am indeed. It's always a pleasure to share information
with another hobbyist, particularly one interested in ID work!
With that in mind, I'll pass along something that I think
you'll appreciate. I looked at that same shrimp photo years
ago and tried to ID it. I'm still looking!>
Thanks for all your hard work!
<You're most welcome and thank you!>
<Take care, Lynn Z>
|Bigger PIX: The images in this table are linked
to large (desktop size) copies. Click on "framed" images
to go to the larger size.
To-Be-Identified Shrimp 12/16/12
Just saw the gorgeous shrimp from IZOO, listed as “to-be-identified”, on
today’s dailies. It appears to be Alpheus soror, aka the “Bullseye
<Ah yes; thank you>
I’ve seen them available on the ‘net listed as such, but found a listing
in Debelius’ Crustacean Guide of The World (2001), page 147. It
lists length up to 3.5cm, distribution as “Maldives, Sri Lanka,
Philippines, probably widespread to IWP”. It also goes on to state
that the two photos listed “show an undescribed species, possibly of the
Alpheus diadema-group. It has purple walking legs, and a conspicuous
large ocellus on the second abdominal segment.”. Hope that helps!
<Indeed it does... And I do have this work... in fact, Helmut is an
olde (we're no longer middle age) friend... He and friends met up w/ us
some Interzoo's ago in Dipelsdorf! >
<Will do. Now down in Cozumel; sans JoshS unfortunately. His cold/flu is
too bad. BobF>
<I'm sorry to hear about Josh, but am glad that you're no doubt having
some good times/diving in Cozumel. Enjoy and Happy Holidays! -Lynn
<<Ah yes. And to you and your husband. BobF>>