Mudskippers may have spawned legends of mermaids - well very small mermaids anyway.
Not exactly a siren's voice tho' YP?
What a life... spending your days up to your eyeballs in mud, and then screaming.
Perhaps that's WHY they scream Cro.
Not what you'd call cute but rather a good candidate for teaching about evolution.
Yes Geeb. Although I expect the creationists would propose them as a way God sets challenges to faith.