Volume 6  Winter 1989 Clams for @Aquarium that the heart, Inhalant and exhalant siphons, and the stomach lie near the top of the body, ust below the mqntte. Thi? altow&thestpL ns to be on to " further In- c-tn the surface area. #dam also have light <;encentratingorgans thatfocus light, onto pockets of zooxanlhellae (Achlerkarftp W%). With th^tfr clams, the dlviha,s iMd tot. be mb.%;g iti females am larger, Indicating that they - eh &**teen t&<y w^ a e*rtÈftv#t~e ThZ rvaeproduced,spendu tot0days j:. In the plankton then setti out Into '.-h suitable environments at 9 length of 200 microns The zooxanthellae -me no- "Â¥' tlmablt after 19 to 40 days, but exactly -L how zooxanthellae are Incorporated by tht : dams IB not entirely understood Â¥ . r";rf"1- $mmEtearGhpSsge 2) @la9Aquarium Systems, he., Mentor, Ohio - Printed in U.S.A. twnosa and T. maxima {Achterkamp %87b). Wdacna crooea to the most demanding specie* with respect to II t and water quality requirements, whf ch Marine Fishes helps to explain Its short life span Ing compared to the other species in (Achterkamp 1987b). captivity. - TMdacna maxima is extremely ince these animals love llaht one is to often tempted to lace them cbto the widespread occurrfn from East Africa surface, be warned, however, that they can Pol nesia. This spec? es reaches a length close their shells with some force and can of I5 cm and Its valves are much longer (3times)thantheyarebroa4 bin Itan expel a surprfsi amount of water out of elon appearance their siphons an"s out of the tank! In some ated (Ac% ter la mp cases, they can also trap small, slow mw- 1987bb Trid- maxima has also a large such byssus opening Intermediate in size be- Ing fish, as mandarins, gobies, or tween the other two species. blenniea. Tridacna In the Aquarium Purchasing Thdacna When these The lacement and behavior of these buying clams there are a clams differs among the species. ~rtdac- few things to look for. First check the In- na squamosa lives In hollowed out areas hatant sl hon (the largest one). It should In rock or coral; therefore, it Is best to be ctodrany elam sat has a constandy place them between pieces of rock or open inhalant siphon is not long for this coral. However, these are very strong world (Achterkomp 1987b). Smell it. If It animals and they can easily push these smells bad don't buy it; its dead Take a rt, possibly destroying the good look at the mantle. It should be wl* rocks orful everywhere, without white or clear displaymyt is beat to carve out a Ieee of rock and place them Inside the hole areas. Check also for rips and tears. See (Achteritamp 1987b). Be careful not to how the animal reacts to an external make the hole too small or th will not be able to far enough. AT so, allow some roomforgrowth. Trfdacna crocea Is the only species that actively makes it own burrows through a I should also take this opportunity to rocking, that grinds a Int out that Trtdacna clams are becorn- cuttin movement ng increasin y difficult to obtain due to hole into the sub - strata. This makes them r difficult to collect if the rock cannot be export fictions In the country of origin taken with them. Unless collected very as well as Import restrictions n Europe carefully the byssus land would moat and the U. &, so If you want one of these sura~ybe ciamagmi den the animal beautiful animals you should get one It soon. They are being banned because the removed from Its home and will not live larger varieties are considered food Ion after such injury (Achterkamp and their numbers are 19Ab). TO g~anintn~OU=I~ healthy sources decreasing specimens, buy them only if they come due to overflshlng. It Is not entirety clear whether the aquarium trade has had any attached to their own substrate. affect on THdacna maxima Is rarely completely lasting these populations but Its a lot easier to ban an entire up of submer ed and, therefore, often covered animals than Individual species.^ wllh varfow overgrowt hs. This species can be t direct! onto any substrate. none of the species appreciates a strong current o water, especially T REFERENCES crocea. The II ht Irements of the I. AchUirturnp. A (1W7e).OoopvontKhm@dl: Abtnw three species dfffer inthe degree of inten- inltidlrw. HÇ Zmqwrlum 37 (4M2-U. sity required: Trtdacna cmcea requires the 2 Achterkamp A. (IW7b). Do6fvont*ch*to*n/2: Soon- greatest light Intensity followed by 1 tit.pr.hlnÈ Hot Zcuquirlum 37 (WO5.llS. Ji~~wriiit'Chocolate Surgeon fish, Acdf~ttiurus pyrofcks, niimics the Eibl's Angelfish. -awa An exam of Bateslam mimicry mi hi beà fish w I? ich has evolved with a color test kit pattern to duplicate that of a toxic specie alkalinity that co-exists In the same habitat. The textbook example of the other type of mimic Is seen in the case of the mimic blenny.This s legsclose resemblance to SeaTeP alkalimty test lot is a convenient the beneflclalcleaner wrasse allows It to way to measure the alkalinity or buffer ap roach other flah long enough to take capacity of aquarium watei a IÂof skin or gill tissue and then quickly flee, 4 Often the mimic relationship is not Essential for the diagnosis of low pH in clear cut. Take, for example, the filefish, marine aquariums. Para/uterea prionurus, re rted to be a mimic of the ufferflsr Canthig- - ualenttni, whose ksh to toxic. Wh then has the puffer developed flapof skin on Aquarium Systems Its dorsal and ventral surfaces which A Manufacturer of Instant Ocean@ resemble the aha doraal and pelvic spines of thà flleflah? Scientists term this Man mimicry when both It joins the school for a time, feeding by from the Pacific Ocean are an example. nd the model are distasteful deceit on unsuspecting fish that don't flee Each of these fascinatin fish closely upon the approach of a seemingly benign mimics a different specf es of pygmy e readily apparent as to group of wrasses. Then the school of angelfish. Rare to non-existent Justa few e model and which wrasses move off, the bknny returns to its now they are almost routinely s it is often usefu lair and awaits the passage of another manyatones.ThellÈtofsultabl school of blueheods. for the home aquarium The Indo-PacifIc region is home to the could go on and on. Far home aquariats, locating both the mimlc and the model and watching their subtle differences In the home can be a inating as well as educational past ime.% HEfCMnaa fwattc1AhT)MJWnO.SheddAqmimm, 1963.Nora DÑM-EJIwr SddAqwriiim Society. Ch- Illlnoli. mhk~.~Â¥ndc.caawki~wfthfofw Bffwm. UvlngMDn Pub. Co. WrmÑml Fulmiytuanb. MÇudl,H.U* lÈ79.Qia<i(rWiadSÇÇWTtJuwi.1b mhwttyPr*Ñ,Tç)çç hd).John B. lMB, QAboflgrfnWio. TTJi Pdrila- tloiu.Nfpiun*Ctty,HÑJwÑ Butterfly and Angelflshes of the World, Volumes I and I1 ~'hese hi hi acclaimed books are available upffn.The two volumes describe all known species of these popular families with an abundance of Information Including species names and synonyms, localities, habitats, dietary nwds, and data on aquarium care. aforementioned cleaner wrasse mimic, taenlahs, whose model Is the he pful cleaner wrasse, Labroides dimtdfatus. The false cleaner fish ob- Y ioualy causes larger fish much conster- nation when, Father than being cleaned of araaites as they roses a bit of skinexpect, ediess the tolarger w. fishthis nasty little ftsb cannot afford to be too common In any iven locality, or their prey would soon ?earn to flee at the ap preach of any fish resembling a cleaner wrasse. Generally, juvenile and regional color variants, as well as adults, are Included in the 500 plus color photos. the reef. - r C. Steene surveys the haps the foremost mimics are the towards potential attackers in the hopes 66Volume species byun RT around Australia and I"blennies which Im~eraomtewrasses. that the redator will believe It to be the View Guinea. Dr. Gerald R. Allen corn- head of t?.c vicious spotted rno Gym- letes the list In Volume II with species nothorax melegrts. Both of themfish are from the Atlantic Ocean, Caribbean Sea, readily obtainable through normal sup* Red Sea, and Indo-Pacific regions. ply channels. In addl tion, they are eaay to A ten page reference table summarizes care for, and seemingly co-exlst well even the habitats, care and feeding for which In the confines of small aquaria. data is available. With different animals arriving to this This beautiful, authoritative set Is a country from new collecting sites with valuable reference for anyone interested greater frequen , more mimic species In marine fishes. Published by Aquarium are available tothe home aquarist then Systems, Inc., it is available through your ever before. Three species of mimic tang local pet dea1er.A chmtu, which, In our opinion, are still the mot depmdable and effective treatment method. the Aquarium The SeaTeaT* Cop r Text Kit Is allbratad fer un In tn! 0 to 0.25~m Your flsh are Infected with external range, dlbelow the text range needed rites. You have been told that copper to monitor the chetated oo pen. Further- tthestandard tnutment and that any In- mom, thÃSÇaTç kit wtlfnot read total vertebrates must be removed. Now you copper levels accurate1 for chelate*. must select a copper medication. To many Therefore, the Sei~edbCopper Kit hobbyist and even some dealers, copper should not bà umd to monitor the 3 Is copper.