{"product_id":"watanabei-angelfish-male","title":"Watanabei Angelfish - Male - Genicanthus watanabei","description":"\u003cp\u003eThe male Watanabei Angelfish (\u003cem\u003eGenicanthus watanabei\u003c\/em\u003e), also known as Watanabe's Angelfish or Blackedged Angelfish, is an elegant reef-safe marine angelfish with striking sexually dimorphic coloration. Mature males display a pale, iridescent blue body accented by a series of dark horizontal stripes across the lower portion of the body and anal fin, with a distinctive yellow-to-orange accent along the uppermost stripe. The result is a refined pattern that immediately separates the male from the more uniformly colored female.\u003c\/p\u003e\n\u003cp\u003eNative to the Pacific Ocean, \u003cem\u003eGenicanthus watanabei\u003c\/em\u003e ranges from Taiwan and the Ryukyu Islands east to the Tuamotu Islands and south to New Caledonia and the Austral Islands. It naturally inhabits current-swept outer reef slopes and drop-offs, often at depths of approximately 70 feet or more, where it feeds primarily on plankton suspended in the water column.\u003c\/p\u003e\n\u003cp\u003eUnlike many marine angelfish, the Watanabei Angelfish is an excellent choice for a reef aquarium because its natural feeding behavior is focused on plankton rather than coral tissue. Its peaceful temperament, graceful open-water swimming, and unusual male coloration make it especially desirable for larger reef systems as well as peaceful fish-only aquariums.\u003c\/p\u003e\n\u003ch2\u003eQuick Care Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCare Level:\u003c\/strong\u003e Moderate\u003cbr\u003e\u003cstrong\u003eMinimum Tank Size:\u003c\/strong\u003e 125 gallons\u003cbr\u003e\u003cstrong\u003eTemperament:\u003c\/strong\u003e Peaceful\u003cbr\u003e\u003cstrong\u003eDiet:\u003c\/strong\u003e Planktivore \/ Omnivore\u003cbr\u003e\u003cstrong\u003eReef Safe:\u003c\/strong\u003e Yes\u003cbr\u003e\u003cstrong\u003eRegion:\u003c\/strong\u003e Pacific Ocean – Taiwan and Ryukyu Islands to the Tuamotu Islands, south to New Caledonia and the Austral Islands\u003cbr\u003e\u003cstrong\u003eScientific Name:\u003c\/strong\u003e \u003cem\u003eGenicanthus watanabei\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eTank Requirements\u003c\/h2\u003e\n\u003cp\u003eThe Watanabei Angelfish should be maintained in a mature aquarium of at least 125 gallons with generous open swimming space. Although adults reach approximately 6 inches, this is an active species that spends considerable time cruising in the water column rather than remaining close to the substrate. FishBase records a maximum total length of 15 cm, or about 6 inches.\u003c\/p\u003e\n\u003cp\u003eArrange live rock around the sides and back of the aquarium to create caves, overhangs, cracks, and secure resting areas while preserving broad areas of unobstructed swimming space. Its natural habitat consists of current-swept outer reef slopes and drop-offs, making good water movement and strong oxygenation particularly appropriate.\u003c\/p\u003e\n\u003cp\u003eA well-established aquarium with efficient filtration and consistently high water quality is recommended. Newly introduced specimens may initially appreciate subdued lighting and ample shelter, particularly because this species naturally occurs on deeper reefs. Quality Marine likewise recommends established aquariums with substantial swimming space and rockwork for shelter.\u003c\/p\u003e\n\u003ch2\u003eDiet and Feeding\u003c\/h2\u003e\n\u003cp\u003eThe Watanabei Angelfish is primarily a planktivore in the wild, feeding on organisms carried through the water column. In captivity, it generally adapts well to a varied diet of high-quality marine foods.\u003c\/p\u003e\n\u003cp\u003eOffer mysis shrimp, enriched brine shrimp, finely chopped shrimp and other marine seafood, copepod-based foods, quality frozen plankton blends, small marine pellets, and flakes. Spirulina, marine algae, and quality angelfish preparations can also be included to broaden the nutritional profile.\u003c\/p\u003e\n\u003cp\u003eTwo to three smaller feedings per day are recommended when practical. Because this species naturally feeds repeatedly from passing plankton, smaller frequent meals suit its normal feeding behavior better than relying solely on one large daily feeding.\u003c\/p\u003e\n\u003ch2\u003eTemperament and Tankmates\u003c\/h2\u003e\n\u003cp\u003eThe Watanabei Angelfish is generally peaceful and is significantly less territorial than many larger \u003cem\u003ePomacanthus\u003c\/em\u003e and \u003cem\u003eHolacanthus\u003c\/em\u003e angelfish. It is well suited to community aquariums containing compatible tangs, wrasses, anthias, gobies, blennies, rabbitfish, and other peaceful to moderately assertive marine fish.\u003c\/p\u003e\n\u003cp\u003eIn nature, \u003cem\u003eGenicanthus watanabei\u003c\/em\u003e forms small harems of approximately two to five individuals. In sufficiently large aquariums, a male may be maintained with one or more females, particularly when the fish are introduced carefully. Quality Marine also notes that pairs or harems may be maintained together when aquarium conditions are appropriate.\u003c\/p\u003e\n\u003cp\u003eAvoid maintaining two established males together in a typical home aquarium, as territorial aggression can develop. A single male, male-female pair, or appropriately structured harem is the safer arrangement.\u003c\/p\u003e\n\u003ch2\u003eReef Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe Watanabei Angelfish is considered \u003cstrong\u003ereef safe\u003c\/strong\u003e and is among the most dependable marine angelfish for coral-dominated aquariums.\u003c\/p\u003e\n\u003cp\u003eUnlike many angelfish that graze heavily on sponges, corals, and other attached reef organisms, \u003cem\u003eGenicanthus\u003c\/em\u003e angelfish are adapted primarily for feeding on plankton in the water column. As a result, they generally leave SPS corals, LPS corals, soft corals, zoanthids, clams, and ornamental invertebrates alone. FishBase documents plankton as the species' natural diet, while both LiveAquaria and Quality Marine classify or describe Watanabei Angelfish as reef compatible.\u003c\/p\u003e\n\u003cp\u003eAs with any individual fish, occasional investigative picking is possible, but persistent coral predation is not characteristic of this species.\u003c\/p\u003e\n\u003ch2\u003eWater Parameters\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature:\u003c\/strong\u003e 75–80°F\u003cbr\u003e\u003cstrong\u003eSpecific Gravity:\u003c\/strong\u003e 1.024–1.026\u003cbr\u003e\u003cstrong\u003epH:\u003c\/strong\u003e 8.1–8.4\u003cbr\u003e\u003cstrong\u003eAlkalinity:\u003c\/strong\u003e 8–12 dKH\u003c\/p\u003e\n\u003cp\u003eMaintain stable, well-oxygenated seawater with consistent salinity, temperature, and pH. Stability is more important than attempting to maintain one exact value within these ranges.\u003c\/p\u003e\n\u003ch2\u003eCommon Considerations\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eActive open-water swimmer:\u003c\/strong\u003e Provide extensive swimming space rather than filling the entire aquarium with dense rockwork.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDeep-reef species:\u003c\/strong\u003e Sheltered areas and subdued conditions during initial acclimation can help newly introduced specimens settle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMale-specific coloration:\u003c\/strong\u003e Mature males develop the characteristic horizontal dark striping that distinguishes them clearly from females.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSocial structure matters:\u003c\/strong\u003e A male may be maintained with females in a sufficiently large aquarium, but two males should generally not be housed together.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExcellent reef candidate:\u003c\/strong\u003e Its natural planktivorous feeding behavior makes the Watanabei one of the more reliably coral-compatible angelfish available to reef aquarists.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TSA Fish","offers":[{"title":"S","offer_id":52307641696554,"sku":"ANGELxWatS","price":449.99,"currency_code":"USD","in_stock":false},{"title":"SM","offer_id":52307641729322,"sku":"ANGELxWatSM","price":458.99,"currency_code":"USD","in_stock":false},{"title":"M","offer_id":52307641762090,"sku":"ANGELxWatM","price":491.99,"currency_code":"USD","in_stock":false},{"title":"ML","offer_id":52307641794858,"sku":"ANGELxWatML","price":533.99,"currency_code":"USD","in_stock":false},{"title":"L","offer_id":52307641827626,"sku":"ANGELxWatL","price":560.99,"currency_code":"USD","in_stock":false},{"title":"XL","offer_id":52307641860394,"sku":"ANGELxWatXL","price":573.99,"currency_code":"USD","in_stock":false},{"title":"XX","offer_id":52307641893162,"sku":"ANGELxWatXX","price":699.99,"currency_code":"USD","in_stock":false},{"title":"SHOW (7.6-9.5\")","offer_id":52307641925930,"sku":"ANGELxWatSH","price":778.99,"currency_code":"USD","in_stock":false},{"title":"JUMBO (9.6\"+)","offer_id":52307641958698,"sku":"ANGELxWatJ","price":867.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/0873\/7322\/files\/WatanabeiAngelMale_23e25210-6138-48f8-95c6-75520ed74736.png?v=1787334368","url":"https:\/\/topshelfaquatics.com\/products\/watanabei-angelfish-male","provider":"Top Shelf Aquatics ","version":"1.0","type":"link"}