How to Say "sea-related" in Spanish
The Spanish word for “sea-related” is “marino” — A2 level. This is a very common word in everyday Spanish.

Examples
Estudiamos la vida marina en la universidad.
We studied marine life at the university.
El puerto tiene una gran actividad marina.
The port has great maritime activity.
Encontramos una estrella de mar en la playa.
We found a starfish on the beach. (Note: 'estrella de mar' is a common phrase, but 'marino' is used for general descriptions)
Adjective Agreement
Like most Spanish adjectives, 'marino' must change its ending to match the noun it describes. For a feminine noun, use 'marina' (e.g., 'costa marina'). For plurals, add an 's' (marinos/marinas).
Forgetting Gender Change
Mistake: “La vida marino es hermosa.”
Correction: La vida marina es hermosa. (Because 'vida' is feminine, the adjective must be 'marina'.)
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.