seen a Hammer.. Mostly because we haven't dove frequently in places they hang out, but we have heard people talk about seeing them on the same dives we've done.. Just not my time, yet.. But diving under schools of hundreds would be surreal.. although I've heard to do it correctly, you really need a rebreather as the bubbles scare them away..

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Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..