Jellyfish

Weight bonus
Jellyfish normally add 0.5 kg, but this can be further increased with weight bonuses.

Trivia
Jellyfish are the least nutritious purchasable food, and the second least nutritious food overall, the first being Plankton.

Sudden death, linked with Jellyfish, and the quote, unlocked after the purchase reference the real-world problem of turtles and sunfish mistaking plastic bags for jellyfish and choking on them.