Are these Prorocentrum or Amphidinium (Large-Cell)?

[threebuoys]

@taricha

If you have a minute, can youd id these varmits and recommend how to dispose of them?

Thanks for your help.

 

[taricha]

prorocentrum.
left-right symmetric,
single indentation on front (also symmetric),
obvious central pyrenoid,
internal round-ish structures split left-right.

example: pic from algae culture center