What Crab

VR28man

Well-Known Member
View Badges
Joined
May 16, 2017
Messages
999
Reaction score
811
I think I got this crab from @reefcleaners as a spotted porcelain crab. But that crab ia up to 7-8mm wide, according to Wikipedia, and this one is easily 10 times the size. this one does appear to filter feed.



Sorry the picture is not very good. I may have to ask again when I can get a better pic.

B708C250-92BE-435A-A8CE-15C45C42C0EF.jpeg
 

ScottR

Surfing season...
View Badges
Joined
Feb 12, 2019
Messages
5,683
Reaction score
16,363
Location
Hong Kong
I have two of these. They’re the size of a dime. One has been with me for over a year now and has grown quite a bit. Maybe nickel sized now. Sorry for poor picture but this is all I have.

D61D8307-5CE2-41F9-AC16-A8DC1F383A8E.jpeg
 

reefcleaners

Active Member
View Badges
Joined
May 15, 2008
Messages
352
Reaction score
291
OP
V

VR28man

Well-Known Member
View Badges
Joined
May 16, 2017
Messages
999
Reaction score
811
John Maloney FTW- thanks! Well, at least it really was what you said it was, since I rechecked my order and it indeed was a blue porcelain crab not the other one. o_O

The main author of that study is actually a girl, and in a quick google search for the species I found she'd done like half a dozen different articles on porcelain crabs. Some things I've found:

- there are of course many species
- galathinus as she says is a species complex
- galathinus can be found from like 1 m down to like 50m.
- porcelain crabs are not true crabs, but a kind of lobster that evolved into a crab. (which kind of makes sense when you look at them)

- they supposedly get up to 1" wide according to a lot of vendor sites, but mine is easily twice that. I'll try to catch him again and measure him.
 

reefcleaners

Active Member
View Badges
Joined
May 15, 2008
Messages
352
Reaction score
291
Oh I think I read it as Alexander at first. They usually measure the carapace in journals rather than the total width of the crab so you have to subtract the claws.
 

Hair Algae in your aquarium. Choose all that apply!

  • I've never had hair algae

    Votes: 34 7.9%
  • I Have had a little but nothing major

    Votes: 108 25.2%
  • I Have had several tough outbreaks

    Votes: 50 11.7%
  • I Have had a major outbreak that I won

    Votes: 133 31.0%
  • Have had a major outbreak that caused me to tear the tank down

    Votes: 19 4.4%
  • I am battling a little hair algae now

    Votes: 102 23.8%
  • I am battling a major outbreak right now

    Votes: 47 11.0%
  • Other (please explain)

    Votes: 4 0.9%

Online statistics

Members online
2,538
Guests online
5,842
Total visitors
8,380
Live Fish Food Combo Packs - AlgaeBarn.com
Top