Reef Central Online Community
Tunze USA

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > Invert and Plant Forums > Tridacnid Clams and other Mollusks
Register Blogs FAQ Calendar Mark Forums Read


User Tag List

Thread Tools
Old 03/14/2010, 01:05 AM   #1
Registered Member
palmer373's Avatar
Join Date: Nov 2009
Location: Alaska
Posts: 1,268
How do you tell clams apart?

well the title says it. I was at a LFS yesterday and he had a few clams. I asked which ones were which and he told me Crocea and Derasa but they all looked the same to me. How does everyoen know the difference between the clams?


palmer373 is offline   Reply With Quote
Old 03/14/2010, 07:44 AM   #2
Registered Member
Join Date: Nov 2008
Location: smyrna
Posts: 3,537
gotta look at their shells, which are different. google tridacna identification. lotsa sites

not obsessse--scuse me gotta check on the tank

Current Tank Info: 75 and 65gals plumbed together, clams 12 fish. lps corals/ aquaillumination leds on the 75 and lovin them. t5's
moliken is offline   Reply With Quote
Old 03/14/2010, 07:54 AM   #3
Registered Member
rkb's Avatar
Join Date: Jul 2009
Location: Western Hemisphere
Posts: 578
What he said^^^. After a while you will notice some very common mantel color patterns and shapes that are "somewhat" unique to each species of clam. Between shells, mantels and simply experience in careful observation the ID of them becomes pretty easy.

Current tank: Eleventy billion gallon tank with a DSB of rainbow gravel and one tiny blue tang...
rkb is offline   Reply With Quote
Old 03/14/2010, 11:20 AM   #4
Registered Member
tahoe61's Avatar
Join Date: Nov 2008
Location: On the state line
Posts: 730
Telling clams apart

Crocea and Derasa are actually the easiest to tell apart. The Derasa has more of a green tint and lined mantel and a smoother shell. The Crocea may or may not have any scutes and tend to be blue to purple in color and more squat in appearence. But these are just generalizations. Just take a look at a Derasa in pics and they pretty much look alike except for the rare exception.

JBJ 28 gal HQI, CPK fuge, Tunze 9002 and West Coast 1/15 chiller.
Neil Y. is the man.

Current Tank Info: Nano
tahoe61 is offline   Reply With Quote
Old 03/14/2010, 02:57 PM   #5
Registered Member
palmer373's Avatar
Join Date: Nov 2009
Location: Alaska
Posts: 1,268
alright thanks ill go ahead and hit google hard!

palmer373 is offline   Reply With Quote
Old 02/10/2018, 03:02 PM   #6
Registered Member
Join Date: Jan 2016
Posts: 3
2018 and I googled "tridacna identification". It brought me here. :/

evolutionXXVII is offline   Reply With Quote
Old 02/11/2018, 10:34 PM   #7
Registered Member
Xxero's Avatar
Join Date: Apr 2015
Location: Oklahoma City
Posts: 1,054

"You Can Lead A Gift Horse To Water...
But You Can't Make Him Look In Your Mouth."

Current Tank Info: 65g Mixed Reef Display - 15g Macro Algae/Refugium - 40b Sump
Xxero is offline   Reply With Quote
Old 02/12/2018, 10:10 PM   #8
OrionN's Avatar
Join Date: Apr 2000
Location: Coastal Texas
Posts: 15,421


My homepage is my album here at Reef Central

Current Tank Info: Reboot 320 anemones reef. Angels: Yellow Chest Regal(2), Flame (2). Copperband But. Tangs: Yellow, Purple. Wrasse: about 20 wrasses various species. Anemones: Giantea X4 (Breen, Blue, Purple and Multicolors), Haddoni X1 Red, Magnifica X1 Purpletip
OrionN is online now   Reply With Quote
Old 02/13/2018, 05:00 AM   #9
Registered Member
homer1475's Avatar
Join Date: Mar 2015
Location: Upstate NY
Posts: 5,333
Doing a little research myself a couple weeks back, I found that only maximas have the little "eyes" around the mantle on the outer edge. While they are not eyes, what they are in fact is areas of little to no coloration which allows more light through to the zooanthelle(sp?).

For 2 years I thought I had a squamosa when in fact it was a maxima. LFS I bought it from sold it as a squamosa. In his defense when small other then the "eyes" on the mantle, the shell(scutes on the shell) and byssal opening are almost identical.

80G SCA Build:

Originally posted by der_wille_zur_macht:

"He's just taking his lunch to work"
homer1475 is online now   Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -6. The time now is 06:27 AM.

TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.