(and experienced) by a group of several animals. It is hard to imagine that an individual animal would not be identified as such, especially in view of the ubiquitousness of signature calls among the vocal signals of cetaceans. But the signature call could also be an element in a more extended self that included several individuals. The basis of the extended, communal self would be the presence of identical patterns of activity at the hierarchical level of "objects" in a particular "real world" as constructed from echolocation data in the different brains There are, of course, many implications for an understanding of behavior if the self is not always a unique and fixed reference point for the external world My intention was to consider this possibility, and I conclude that it should not be rejected for dolphins.
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