Re: Why are there no phosynthetic animals?

Erland Gadde wrote:

If we (perhaps somewhat improperly) define "animal" a mobile,
macroscopic organism, then why are there no photosynthetic animals?
All photosynthetic orgamisms I know of are either immobile plants or
(possibly mobile) microorganisms?

Symbiosis works well enough.

Corals are animals with photosynthetic symbionts.

Sea slugs are mobile photosynthesizing animals:

http://www.seaslugforum.net/showall.cfm?base=solarpow

.....that use algae to do the conversion work.

Why reinvent something - when you can borrow an existing solution?
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