Aaptos aaptos

Aaptos aaptos is a sea sponge belonging to the Phylum Porifera. This particular species is known to contain adrenoreceptor-blocking compounds. While it is highly toxic to fish, it is known to be preyed upon by the hawksbill turtle, Eretmochelys imbricata. ...
Found on http://en.wikipedia.org/wiki/Aaptos_aaptos
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