'''''Aaptos aaptos''''' is a species of [[sea sponge]] belonging to the family [[Suberitidae]].<ref name="WoRMS" />
This particular species is known to contain [[adrenoreceptor|adrenoceptor]]-blocking compounds.{{cn|date<ref name=July":0" 2021}}/> While it is highly toxic to fish, it is known to be preyed upon by the [[hawksbill turtle]], ''[[Eretmochelys imbricata]]''.<ref name="ScienceSpongi">{{cite journal | last =Meylan | first =Anne | title =Spongivory in Hawksbill Turtles: A Diet of Glass | journal =Science | volume =239 | issue =4838| pages =393–395 | publisher =American Association for the Advancement of Science | date =1988-01-12 | doi = 10.1126/science.239.4838.393| pmid =17836872 | jstor=1700236}}</ref>
[[File:Aaptamine.svg|150px|thumb|left|[[Aaptamine]], an alkaloid isolated from ''Aaptos aaptos''<ref name=":0">{{Cite journal |last=Nakamura,H.|first=Hideshi et|last2=Kobayashi al|first2=Jun'ichi |last3=Ohizumi |first3=Yasushi |last4=Hirata |first4=Yoshimasa |date=1982 |title=Isolation and structure of aaptamine a novel heteroaromatic substance possessing α-blocking activity from the sea sponge Aaptos aaptos |url=https://www.,sciencedirect.com/science/article/pii/S0040403900858931 |journal=Tetrahedron Lett.,Letters 1982,|volume=23 |issue=52 |pages=5555–5558 |doi=10.1016/S0040-4039(00)85893-1 5555|issn=0040-4039}}</ref>]]
