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Fresh Water Shrimp

Macrobrachium hancocki


a bright blue crayfish about 3 inches long.


clear and clean streeam in tropical dry forest in NW Costa Rica end of rainy season


sorry for the poor photos, this guy was moving non-stop and under three inches of water. I couldn't properly focus

4 Species ID Suggestions

Red Crayfish
Procambarus Clarkii issg Database: Ecology of Procambarus clarkii
Electric Blue Crayfish
Procambarus alleni
Macrobrachium sp, Familia Palaemonidae, Orden Decapoda.
Macrobrachium hancocki

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61 Comments (1–25)

LarryGraziano 7 years ago

No shortage of suggestions Mark…that's for sure. However, we got it locked down after plenty of research! Thanks Mark and Maria!

Mark Ridgway
Mark Ridgway 7 years ago

Sorry I missed this one Larry. It's a beauty. (no shortage of suggestion choices here either but we might call it a yabby)

Maria dB
Maria dB 7 years ago

Cool spotting!

LarryGraziano 8 years ago

Thanks ceejayalyssa! I am so glad you enjoyed it!

ceejayalyssa 8 years ago

never seen one like this. amazing color! thank you for this picture

LarryGraziano 9 years ago

Mae, te ganaron por solo unos dias nada mas. Que bien que recordaste de mi! gracias...un abrazo!

Ismael Chaves
Ismael Chaves 9 years ago

Hoy vi esta langosta en una foto de la universidad y de una ves me recorde de este spotting y apunte el nombre cientifico para dartelo, pero parece q me ganaron jaja

LarryGraziano 9 years ago

Thank you Alexander! I have been researching and researching for quite some time to get a proper I.D. for this lovely creature. How did you know which it was? Are the macrobrachium your specialty? There is only one site with photos relating to this species.

Alexander M. Kim
Alexander M. Kim 9 years ago

It's without a doubt Macrobrachium hancocki, related to M. crenulatum on the Atlantic versant. The metallic blue coloration is very characteristic.

CindyBinghamKeiser 9 years ago

Thank you for the tip and link!

LarryGraziano 9 years ago

cindy, here is the link for the other mission:
I just learned that if you want to see all the available missions than you can go to missions, click local, delete your geographic area from the spacebar, click search. you should see all th missions everywhere in the world.

CindyBinghamKeiser 9 years ago

Hi IgCostaNut, I added a spotting to The Color Blue mission. Obviously this is purple but I didn't see a purple mission. Please let me know if you would like me to remove this and my other purple spottings. Thanks!

LarryGraziano 9 years ago

si quieres, te mando una en alta resolucion....gracias amigo!

Ig, envié la foto a varios amigos incluso de INBIO esperemos a ver que nos dicen....

LarryGraziano 9 years ago

Thanks Ann! I am pretty sure this is a shrimp like Jonathan suggested. The crayfish that most people see are the procambarus variety which are common through the U.S.

annorion 9 years ago

There were at least 4-5 blue crayfish at the Aquarium of Americas in New Orleans last time we went. They are the local red variety with a gene mutation but they may be able assist with species ID...

LarryGraziano 9 years ago

any shrimp or crayfish specialists out there for an I.D.?

LarryGraziano 9 years ago

glad to share!

BretTennis 9 years ago

great to see, thanks!

LarryGraziano 9 years ago

Thanks Robert!

RobertCosme 9 years ago

Amazing color!! beautiful shot!

LarryGraziano 9 years ago

Thanks ulvalactuca

ulvalactuca77 9 years ago


LarryGraziano 9 years ago


Sacrificar uno por la ciencia puede se la razón de proteger toda la especie, asi que puede valer la pena ....

Spotted by

Costa Rica

Spotted on Nov 12, 2011
Submitted on Nov 12, 2011

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