Mud Crabs Have Arrived ,Rropanopeus harrisii, Now with Eggs

[MABJ]

Originally Posted by Rob in Puyallup

Must be extra hardy, seems they're taking over the whole world:

http://en.wikipedia.org/wiki/Rhithropanopeus_harrisii

Yup! That's them.

[Sake]

Been waiting for these to arrive subbed.

[dougolasjr]

Originally Posted by MABJ

Yes, yes, yes, yes, yes. Thanks so much for sending me this link

These are so neat. I'll be looking forward to updates )

How big are they, what tank are you keeping them in and have they been aggressive yet?

I would say they are about 1 cm they have not been aggressive. They are in a tank with just snails so. The tank is a 10 gallon with lots of peacock moss. It was originally intended for Thai Micro Crabs but...

[HX67]

Hey, great! Thanks for this thread!

Ever since finding out this species is rapidly inhabiting The Baltic Ocean, I've been wanting to find and keep some.

Following along to see how they work for you.

A question: many crabs need/like emersing from water at times. Are you seeing any signs of this, or is it a true aquatic species, like most of the full marine crab species seem to be?

[dougolasjr]

They mostly have been hanging out in the moss. I haven't had much time to watch them tho.

[MABJ]

HX67 from what I read and what the seller tells me, they are fully aquatic. However, that doesn't necessarily mean they are.

[HX67]

Originally Posted by MABJ

HX67 from what I read and what the seller tells me, they are fully aquatic. However, that doesn't necessarily mean they are.

Indeed!
The plot thickens, somewhat.

Kid'n.

Just a parameter I'm interested in.
After having kept Geosesarmas, Sesarmas, Ucas, Cardisoma, Gecarcinus and a couple of unidentified crabs and finding/getting several species of Full marine crabs in reef setups, I want to know more about them.

AND I'm finishing a setup suitable for semi-amphibious freshwater/brackish crabs, so further data on R. harrisii is welcomed.

[dougolasjr]

I have a big mass of banana plant leaves that sit at the top, and I have not see them make any move to try and leave the water.

[dougolasjr]

More pics.

[GreenBliss]

Love the last photo.

[Geniusdudekiran]

Do they come up for air, or are they fully aquatic?

[MABJ]

Originally Posted by Geniusdudekiran

Do they come up for air, or are they fully aquatic?

That was a question already in this thread. Lol two or three posts up he said he hadn't observed it. When I pmed the seller, he told me fully aquatic as well. Now that doesn't mean they are, but still.

[MABJ]

Originally Posted by dougolasjr

More pics.

Really digging the pics. I'll be interested to hear your take on space requirements. Once they grow out and get their territory picked out, you should have a good feel for it.

[dougolasjr]

Originally Posted by Geniusdudekiran

Do they come up for air, or are they fully aquatic?

I have not observed anything that would make me think they have any need to come up for air.

[Geniusdudekiran]

Originally Posted by MABJ

That was a question already in this thread. Lol two or three posts up he said he hadn't observed it. When I pmed the seller, he told me fully aquatic as well. Now that doesn't mean they are, but still.

Oh, I see. But just because something leaves the water doesn't mean it's not fully aquatic -- Amano shrimp jump and crawl out of the water given the chance, but nobody can say they're non-aquatic lol. But I see what you're saying.