Can we include sealife...?    Plankton.


Hannah Werdmuller's Diurnal Migration -

Much of the ocean is not yet explored
Though submarines pootle about the sea floor
Discovering new species wherever they go
Such as elephant-like-squid and eels that glow.

The following formula's certainly true
Of predation dynamics down in the blue:
From the tiniest plankton to the biggest species yet,
One thing they eat, by another are ate.

Here is where a dilemma arises
For the noble phytoplankton photosynthesises
And is thus confined to where the sun shines through,
And so by necessity what eats them too.

But in the photic zone it is easier to see -
The surface is a dangerous place to be.
The darkness it offers substantial protection
From becoming some predator's tasty confection.

So to the surface fishies travel at night
When there's less chance of being espied in the light
But during the day to escape predation
They return deeper down, and that's diurnal migration.



from Pre​-​Apocalyptic Love Song: Limited Edition album, released January 1, 2011

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Diurnal Migration - Hannah Werdmuller