Neogonodactylus

Web casting

C. aspilosomatis has long, thin arms that it uses to probe for prey. However, when small, highly mobile prey such as shrimp are flushed, these arms are not very useful for catching such elusive quarry. The octopus switches tactics and casts its web over the prey, trapping it. This is similar to the predatory behavior called "speculative pounce" by Yarnall, but in this species the behavior is directed at visible, fleeing prey.
I just saw this. C. aspilosomatis could easily be mistaken for O. briareus.
 
Looking at Norman's description and your photo, I wonder if this is the Macropus that we occasionally see in the trade. I noted with the two that I kept how similar they could look to briareus in this coloration.
 

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