There are several very popular indoor plants that aren't good for cats, dogs, or both.
Plants that are toxic to cats include: lilies, jade plants, peace lilies, snake plants, aloe vera, monstera, sago palms, English ivy, tulips, daffodils, chrysanthemums, and poinsettas.
Plants that are toxic to dogs include: aloe vera, ivy, jade plants, sago palms, elephant ear, philodendron, peace lilies, dumb cane, and pothos/devil's ivy.
But these aren’t the only dangerous species. There are over 470 household plants that pose a threat to animals. Some of the other plants on the list include daisies, hydrangeas, peonies, chives, mint, and mistletoe. It's a good practice to look up each plant in your home specifically and either elevate them out of access or remove them completely.