Seashell is a G1 My Little Pony released in 1983.

US Backcard Story

Seashell was at the beach chasing the waves and rolling in the deep sand dunes. She bent down to lick the salt off her hoofs and, before she knew it, one of her Sea Pony friends had clamped on to her beautiful mane. "Why are you hanging on my mane, Sea Pony?" Seashell asked. "I want to go for a ride," replied her friend, "a real pony ride." "If you asked politely, I'd be happy to give you a ride," Seashell said. But the Sea Pony said nothing and clamped down even harder. Shaking her head in dismay, Seashell gave her a ride she'd never forget!

UK Backcard Story

Seashell loves the ocean. She spends hours chasing the waves, rolling in the sand dunes, and playing with all her seaside friends. She also loves to body surf on the giant waves.