The sponge Siphonodictyon can grow through coral heads. It makes compounds that can kill the coral, allowing it to colonize more space. Image courtesy of Islands in the Sea 2002, NOAA/OER.
The sponge Siphonodictyon can grow through coral heads. It makes compounds that can kill the coral, allowing it to colonize more space. Image courtesy of Islands in the Sea 2002, NOAA/OER.