Dolphin Killed by Seal: A New Predator Emerges?

A short-beaked common dolphin has been killed by a grey seal along the Welsh coast. Investigators found the 6ft female dolphin on Newgale beach with "corkscrew" injuries, strongly suggesting an attack by a grey seal. This incident may be linked to a pod of grey seals observed in coastal waters from Wales to Devon.

Marine experts theorize the attack was an ambush, as dolphins are faster than seals. However, with a notable increase in common dolphin sightings in Welsh waters over the past decade, their perception of seals as predators is likely to change.

Concurrently, grey seal populations are also on the rise, particularly in Scotland and likely Wales. This increase in seal numbers is expected to lead to more predator-prey incidents. Male grey seals, which can grow significantly larger and heavier than females, are believed to be responsible for these attacks.

Researchers suspect that seasonal hormonal surges in male seals during winter breeding periods may contribute to aggression. The spiral lacerations on the dolphin are caused by seals using their powerful jaws to tear off energy-dense blubber. While they may consume some blubber, they often abandon the carcass after the attack.