[3] Beroe ovata is a pelagic species and has a wide distribution in the Atlantic Ocean and Mediterranean Sea.

[5] Beroe ovata is a predator, opening its mouth wide and sucking in prey, sometimes as big or bigger than itself.

[2] Under optimal conditions, Beroe ovata can eat as much as four times its body weight each day and has a maximum daily growth rate of 0.37 to 0.66.

The eggs are large and transparent and the planktonic larvae pass through a number of developmental stages before adopting the adult form.

Beroe ovata, which feeds on M. leidyi, was introduced as a biological pest control to try to redress the balance.

The result is that the introduction of B. ovata has considerably shortened the time large numbers of M. leidyi are present in the plankton and therefore their predatory impact on the zooplankton.