This is a variant spelling of Couailhac's Op. 3. It utilizes typical 19th-century figurations to create an impression of fluidity and gentle motion.
Focus on evenness in the sixteenth notes to ensure the 'sea-like' effect remains calm and musical rather than mechanical.
Comparable difficulty and character — good candidates for what to learn next.
Brise de mer (Op.3) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Brise de mer (Op.3) lasts about 3 minutes.
Brise de mer (Op.3) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Berceuse by Armas Järnefelt, By Moonlight by Franz Bendel, By the Lake by Gordon Balch Nevin — see the full similar-pieces list on this page.