there are plenty/lots more fish in the sea

there are plenty more fish in the sea

There are many other excellent or more suitable people, things, opportunities, or possibilities in the world that one may find. Said especially when one has recently been unlucky, unsuccessful, or has broken up with a romantic partner. I know you are broken up about Janet leaving you, but there are plenty more fish in the sea. I'm pretty disappointed that I didn't get the job, but I'm trying to remind myself that there plenty more fish in the sea.
See also: fish, more, plenty, sea, there
Farlex Dictionary of Idioms.

there are plenty more fish in the sea

or

there are other fish in the sea

1. If you tell someone that there are plenty more fish in the sea or there are other fish in the sea, you mean that there are many other people they could have a relationship with. Tell him there are plenty more fish in the sea and he's sure to find the perfect woman. If your daughter is upset because her boyfriend left her, declaring cheerfully `There are other fish in the sea' won't help. Note: This expression is sometimes varied. Remember that there are many more fish in the sea.
2. If you say there are plenty more fish in the sea or there are other fish in the sea, you mean there are other opportunities that can be taken. In the case of the motor industry, there really are other fish in the sea. Note: This expression is sometimes varied. The government says there aren't enough fish in the sea to sustain current levels of employment.
See also: fish, more, plenty, sea, there
Collins COBUILD Idioms Dictionary, 3rd ed.

there are plenty more fish in the sea

used to console someone whose romantic relationship has ended by pointing out that there are many other people with whom they may have a successful relationship in the future.
This expression alludes to the proverb there are as good fish in the sea as ever came out of it .
See also: fish, more, plenty, sea, there
Farlex Partner Idioms Dictionary

there are plenty/lots more fish in the ˈsea

,

there are (plenty of) other fish in the ˈsea

(informal) there are many other people or things that are as good as the one somebody has failed to get: ‘I’ll never love anyone as much again.’ ‘Look, Julie, there are lots more fish in the sea, you know.’
See also: fish, lot, more, plenty, sea, there
Farlex Partner Idioms Dictionary
See also:
  • 1FTR
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • give (one) (one's) head
  • give head
  • give somebody their head
  • give someone their head
  • cooking for one
  • as one door closes, another (one) opens