Life of Sea | Atlantic Humpbacked Dolphin (Sousa teuszii) | Atlantichumpbacked dolphinis found inthe easternAtlanticOcean,theWestern Sahara, south tosouthern Angola. This speciesprefersshallowcoastal waters, rivers,canalsandestuaries. This is a somewhatsolitaryspecieshave been observedtravelingand feedingalone, however,small groupsof 3-7andlarger groupsof 20-25have also beenreported, these groupsgenerallyconsist of youngdolphins.
The most distinctivefeature ofthis speciesis its distinctivehumpedappearance whenit breaksthe oceansurface to breathe.Thisis causedby thelargehump orridge on theback ofthe dolphin,from which thedorsal finforward.The Atlantichumpbacked dolphinhasa robustbody ofmammals,mostlyslategray onthesides and backandlight grayon the bottom.Ithasalong, narrow,distinctbeak,broadflippersthat arerounded at thetop, andabroadtail, deep cutin thecentral.Atlantichumpbacked dolphinmalesare largerthanfemales.
Because of theirgeographiclocation inAfrica inthenearregions ofcivil war,Atlantichumpbacked dolphinshavenot been widelystudied. Atlantichumpbacked dolphins26-31pairs ofsame teeth,peg-liketeeth ineachjaw.The differences incountingteethandvertebrae,along withits geographical location, the maindistinguishing characteristics betweentheteusziiSousaand the closely relatedIndo-Pacifichumpbackeddolphins,Sousa chinensis.
Atlantichumpbacked dolphinis known to beslowerthan otherspecies in theDelphinidaefamilyswim. They diveforperiods up tothree minutesandare known tojumpout of the water. Othercommon characteristicsincludeDelphinidae, their highbrain-to-body mass ratio, which is higherthanthat ofothermammalsand think thatanindicationof intelligence. Like otherdolphins, they are equippedwithsonarto locatepreyoutand communicate.
Off the coast ofMauritaniaoutside, this specieshasestablishedanequitablepartnership with thelocalfishermen.The dolphinsherdschools of fishcloser toshorewhenspottedby fishermen, itproposesthe fishermenasthe fishandfeedthe dolphinsfree.Atlantichumpbacked dolphins feed onschooling fishsuch as herring, sea bream, sardinesandmullet. When feedingin a group, theyherdtheir preyclose to the ground, making it harder forthepreyto escape.Like otherdolphinspecies,Atlantichumpbacked dolphins areatrisk of being caughtin fishing nets, remote, and proximity tothecoastmakes themtrapped in'anti-shark "external netsdesigned toprotectbeach goers. Coastal developmentisreducingthe habitat of thesespeciesalsocausedecrease inthepopulation.