P. laeta may refer to:
Paramarpissa laeta, a jumping spider Pavetta laeta, a plant with white flowers Periploca laeta, a North American moth Pholis laeta, an elongated fish Physocephala laeta, a thick-headed fly Potentilla laeta, a perennial plant Pselliophora laeta, a crane fly Pseudorinympha laeta, an ermine moth Ptosima laeta, a jewel beetle Pyrrhospora laeta, a lichenized fungus Pyrrhulina laeta, a South American fish