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List by: Taxa - Shape
AcroporidaeAcropora cervicornisAcropora palmataAcropora proliferaAgariciidaeAgaricia agaricitesAgaricia fragilisAgaricia grahamaeAgaricia humilisAgaricia lamarckiAgaricia tenuifoliaAgaricia undataLeptoseris cucullataLeptoseris speciesAstrocoeniidaeMadracis carmabiMadracis decactisMadracis formosaMadracis mirabilisMadracis pharensisMadracis senariaStephanocoenia interseptaDendrophylliidaeBalanophyllia grandisLeptopsammia trinitatisTubastraea coccineaFaviidaeCladocora arbusculaColpophyllia natansDiploria clivosaDiploria labyrinthiformisDiploria strigosaFavia fragumManicina areolataMontastraea annularisMontastraea cavernosaMontastraea faveolataMontastraea franksiSolenastrea bournoniHydrozoansMillepora alcicornisMillepora complanataMillepora squarrosaMillepora striataStylaster roseusMeandrinidaeDendrogyra cylindrusDichocoenia stokesiiEusmilia fastigiataMeandrina danaeMeandrina meandritesMeandrina species 1MussidaeIsophyllastrea rigidaIsophyllia sinuosaMussa angulosaMycetophyllia aliciaeMycetophyllia danaanaMycetophyllia feroxMycetophyllia lamarckianaMycetophyllia reesiiScolymia cubensisScolymia laceraPoritidaePorites astreoidesPorites branneriPorites colonensisPorites divaricataPorites furcataPorites poritesSiderastreidaeSiderastrea radiansSiderastrea siderea
FingersCladocora arbusculaEusmilia fastigiataMadracis carmabiMadracis decactisMadracis formosaMadracis mirabilisPorites divaricataPorites furcataPorites poritesStylaster roseusTubastraea coccineaFire CoralsMillepora alcicornisMillepora complanataMillepora squarrosaMillepora striataLarge BranchesAcropora cervicornisAcropora palmataAcropora proliferaLumpyMadracis pharensisMadracis senariaMassive BrainsColpophyllia natansDendrogyra cylindrusDichocoenia stokesiiDiploria clivosaDiploria labyrinthiformisDiploria strigosaIsophyllia sinuosaManicina areolataMeandrina danaeMeandrina meandritesMeandrina species 1Massive StarAgaricia humilisFavia fragumIsophyllastrea rigidaMontastraea annularisMontastraea cavernosaMontastraea faveolataMontastraea franksiPorites astreoidesPorites branneriSiderastrea radiansSiderastrea sidereaSolenastrea bournoniStephanocoenia interseptaSolitary or GroupsBalanophyllia grandisLeptopsammia trinitatisMussa angulosaScolymia cubensisScolymia laceraThick LeafyMycetophyllia aliciaeMycetophyllia danaanaMycetophyllia feroxMycetophyllia lamarckianaMycetophyllia reesiiPorites colonensisThin LeafyAgaricia agaricitesAgaricia fragilisAgaricia grahamaeAgaricia lamarckiAgaricia tenuifoliaAgaricia undataLeptoseris cucullataLeptoseris species
AgelasidaeAgelas citrinaAgelas clathrodesAgelas conifera AAgelas conifera BAgelas disparAgelas tubulataAgelas wiedenmayeriAplysinellidaeSuberea species 1AplysinidaeAiolochroia crassa AAiolochroia crassa BAiolochroia crassa CAplysina archeri AAplysina archeri BAplysina cauliformis AAplysina cauliformis BAplysina fistularisAplysina fulvaAplysina insularisAplysina lacunosaVerongula giganteaVerongula reiswigiVerongula rigidaVerongula sppAxinellidaePtilocaulis walpersiCallyspongiidaeCallyspongia fallaxCallyspongia pliciferaCallyspongia vaginalis ACallyspongia vaginalis BChondrillidaeChondrilla nuculaClionaidaeCliona apricaCliona caribbaeaCliona delitrixCliona laticavicolaCliona tenuisCliona variansSpheciospongia vespariumCoelosphaeridaeLissodendoryx colombiensisCrambeidaeMonanchora arbusculaDesmacellidaeNeofibularia nolitangereDesmacididaeDesmapsamma anchorataDictyodendrillidaeDictyodendrilla nuxSvenzea zeaiDictyonellidaeScopalina ruetzleriGeodiidaeGeodia neptuniIotrochotidaeIotrochota birotulataIrciniidaeIrcinia campanaIrcinia felixIrcinia species 1Ircinia species 2Ircinia strobilinaMicrocionidaeClathria virgultosaPandaros acanthifoliumMycalidaeMycale laevisMycale laxissimaNiphatidaeAmphimedon complanataAmphimedon compressaCribrochalina infundibulumNiphates digitalisOceanapiidaeOceanapia bartschiPetrosiidaePetrosia pellasarcaXestospongia mutaXestospongia proximaXestospongia rosariensisXestospongia subtriangularisPlakinidaePlakinastrella onkodesPlakortis sppRaspailiidaeEctyoplasia feroxSpirastrellidaeDiplastrella megastellataSpirastrella coccineaTetillidaeCinachyrella sppThorectidaeHyrtios cavernosusSmenospongia cerebriformisSmenospongia conulosa
BarrelsGeodia neptuniVerongula giganteaXestospongia mutaBoring-EncrustingCliona apricaCliona caribbaeaCliona delitrixCliona laticavicolaCliona tenuisCliona variansDiplastrella megastellataEctyoplasia feroxMonanchora arbusculaMycale laevisScopalina ruetzleriSpirastrella coccineaXestospongia proximaBowls and SheetsAgelas clathrodesCribrochalina infundibulumPetrosia pellasarcaChains of TubesAgelas conifera AAgelas conifera BDesmapsamma anchorataSmenospongia cerebriformisSmenospongia conulosaXestospongia subtriangularisMassive SpongesAgelas citrinaAgelas disparAiolochroia crassa AAiolochroia crassa CChondrilla nuculaCinachyrella sppDictyodendrilla nuxHyrtios cavernosusIrcinia campanaIrcinia felixIrcinia species 1Ircinia species 2Ircinia strobilinaLissodendoryx colombiensisNeofibularia nolitangerePlakinastrella onkodesPlakortis sppSpheciospongia vespariumSvenzea zeaiRopes and FansAmphimedon complanataAmphimedon compressaAplysina cauliformis AAplysina cauliformis BAplysina fulvaClathria virgultosaIotrochota birotulataPandaros acanthifoliumPtilocaulis walpersiTubesAgelas tubulataAgelas wiedenmayeriAiolochroia crassa BAplysina archeri AAplysina archeri BAplysina fistularisAplysina insularisAplysina lacunosaCallyspongia fallaxCallyspongia pliciferaCallyspongia vaginalis ACallyspongia vaginalis BMycale laxissimaNiphates digitalisOceanapia bartschiSuberea species 1Verongula reiswigiVerongula rigidaVerongula sppXestospongia rosariensis
AnthothelidaeErythropodium caribaeorumAntipathariaAntipathes caribbeanaAntipathes pennaceaBriareidaeBriareum asbestinumBriareum species 1CorallimorphsRicordea floridaGeneral ViewsMixed CommunitiesGorgoniidaeGorgonia flabellumGorgonia mariaeGorgonia ventalinaIciligorgia schrammiPseudopterogorgia acerosaPseudopterogorgia americanaPseudopterogorgia bipinnataPseudopterogorgia elisabethaePseudopterogorgia rigidaPterogorgia ancepsPterogorgia citrinaPterogorgia guadalupensisHydroidaDentitheca dendriticaPlexauridaeEunicea calyculataEunicea laciniataEunicea laxispicaEunicea mammosaEunicea pallidaEunicea palmeriEunicea species 1Eunicea succineaEunicea tournefortiMuriceopsis bayerianaMuriceopsis flavidaPlexaura flexuosaPlexaura homomallaPlexaurella speciesPlexaurella dichotomaPlexaurella griseaPlexaurella nutansPseudoplexaura crucisPseudoplexaura flagellosaPseudoplexaura porosaZoanthidaePalythoa caribbaeorum
Black CoralsAntipathes caribbeanaAntipathes pennaceaCandelabrasPlexaura flexuosaPlexaura homomallaCorallimorphsRicordea floridaEncrustingErythropodium caribaeorumFlat BladesPterogorgia ancepsPterogorgia citrinaPterogorgia guadalupensisGeneral ViewsMixed CommunitiesGorgoniansGorgonia flabellumGorgonia mariaeGorgonia ventalinaIciligorgia schrammiHydrozoansDentitheca dendriticaLong CalicesEunicea calyculataEunicea laciniataEunicea laxispicaEunicea mammosaEunicea palmeriEunicea species 1Eunicea tournefortiLong CallicesEunicea pallidaEunicea succineaPlumes - FeatherPseudopterogorgia americanaPlumes - FeathersMuriceopsis flavidaPseudopterogorgia acerosaPseudopterogorgia bipinnataPseudopterogorgia elisabethaePseudopterogorgia rigidaShort BranchesMuriceopsis bayerianaTall BushesPlexaurella speciesPlexaurella dichotomaPlexaurella griseaPlexaurella nutansPseudoplexaura crucisPseudoplexaura flagellosaPseudoplexaura porosaUnbranched FingersBriareum asbestinumBriareum species 1ZoanthidsPalythoa caribbaeorum
Photo 1 of
Madracis formosa(Wells 1973)
Colonies are branching, each clump being much more irregular than Madracis mirabilis. Also the branches also get much longer so the overall colony size is larger. Cross sections of branches are irregular rather than round, and incipient branches cause their tips to become lumpy and club-shaped.
Colour is green, yellow-green, yellow-brown or tan. Polyps are yellow in this species but not in M. decactis. Branches are usually longer than M. decactis but thicker than M. mirabilis.
Corallites usually have 8 septa, unlike M. decactis and M. mirabilis, which both have 10. It is easily confused with Madracis carmabi, which has the same morphology and which also has 10 septa and is considered by some to be a hybrid species.
Colour is green, yellow-green, yellow-brown or tan. Polyps are yellow in this species but not in M. decactis. Branches are usually longer than M. decactis but thicker than M. mirabilis.
Corallites usually have 8 septa, unlike M. decactis and M. mirabilis, which both have 10. It is easily confused with Madracis carmabi, which has the same morphology and which also has 10 septa and is considered by some to be a hybrid species.