fish

• ocean sunfish
• barreleye
• moonfish
• rattails
• arapaima
• not really fish but giant siphonophores and salp

space

• dyson sphere
• europa
• kesler syndrome
• terraforming
• exoplanet
• chicxulub impactor
• planetary defense
• dust shells
• quasar
• event horizon
• kugelblitz
• in the event of a NEO headed on a collision course with earth, order of alert would be: IAWN (includes NASA & ESA) → white house for US or UNOOSA for intl affairs → public announcement

other

• heart rot
• vampiric thrall
• fae contract loopholes