Two extra seagulls were used to portray Steven Seagull in
The Shallows (2016). According to producer
Matti Leshem, she added "They were all good but not nearly as good as him. Peggy was the vocal one, the very squawky bird. Gaviota (which means seagull in Spanish), I think he's almost 30 [as Steven is estimated to be about 15 or 20 years old]. The most challenging thing about
Sully Seagull as an actor is that seagulls are remarkably clean. They self clean a lot, so the blood on Sully, obviously fake blood, he kept wanting to clean it off, so we had to deal with that.".