Imagine that the bone in your forehead
gave you super powers to “see” – through dark –
a school of fish or empty bellied shark –
things you like to eat, something you must dread.
A full control of sonar waves allow
cetaceans greater focus than we thought
to ascertain if it’s catch or be caught
established by the muscles of their brow.
They can direct sonar in such tight beams
they differentiate between a crab
or squid, know how to swim for each to grab
their prey with planned efficiency it seems.
To know if a shark is hungry that day,
their ultrasound’s the most effective way.