For want of the phyto plankton

For want of the phyto plankton the krill was lost,

For want of the krill the icefish was lost,

For want of the icefish the weddell seal was lost,

For want of the weddell seal the leopard seal was lost,

For want of leopard seal the killer whale was lost,

And all for the want of the phyto plankton.