Modern specimen of the bivalve *Spisula solidissima* showing numerous holes made by boring sponges (T-210). These dwelling traces are called *Entobia.* Specimen is from Cape May County, New Jersey and is part of the teaching collection of the [Paleontological Research Institution](http://www.priweb.org), Ithaca, New York. Width of clam shell is approximately 12.5 cm. Model by Emily Hauf.