我們時常可看到魚友反應，飼料太大顆，魚無法吃下！這是飼料顆粒尺寸太大？還是魚的嘴巴太小呢？
Many fish friends say, the feed too large, fish can not eat it, Is this the feed particle size too large it? Or fish's mouth too small?
市售因應各種魚隻所需，會製作大小不一的尺寸，大多分為超細、小、中、大...等尺寸，提供不同尺寸魚隻大小食用。以魚覓食習性來看，體型較小的魚隻，只能餵食較小尺寸的飼料嗎？如果從魚的吃餌、覓食的習性來看，與人工飼養的觀賞魚吃餌進食方式，不同生活環境下的魚群，吃餌覓食習性與方式卻完全不同！主要是受到飼養方式改變了魚習性與方式。
Fish feed in market to sell, there are many different size, including, tiny(SS), small(S), medium(M) and large(L), We observed fish foraging habits and manner, "Small size fish only eat small feed?" it is different eating patterns between artificial breeding of ornamental fish and live in outdoor fish (natural environment) by eat bait, foraging habits completely. Fish be enforced to change eat bait habit and way from feeding practices.
（一）、觀察食物來源、覓食方式與習性 Observe food sources, feeding ways and habits
魚在大自然環境下，原本就是到處覓食，當找到食物時，會先入口咬嚼後再吞肚，坦若食物體積較大，會以啄食方式進食，不可能出現直接將較大體積食物吞進肚，當魚出現啄食時，就已將食品分解變小。觀察水池中的魚群，到處尋找食物，形成「一口一口吃」，當找到食物體積過大時，也會分次進食，不會將食物「一口硬吞進肚子」。
Fishes are prowl live in natural environment, fishes will crunch and swallow when find food, If the food size is large, they will eat it by pecking, it is impossible to swallow large food into belly directly, Fish break down food into smaller size by pecking, we can observe fish bait way, while they are while looking for food, while eating food. they will graded eating when food size is large.
反觀，人工飼養的魚群中，尤其是金魚、錦鯉魚、鯽魚、鯉魚...等魚種，在倒餌餵食時，幾乎是搶奪、爭奪方式吃餌，魚群會「先拼命掃光食物，以免食物被奪走！」，當體積較大時，依然是「先吃再說！」，已不顧食物的大小。而許多嘴型較小的魚種，則受限於嘴型大小，呈現啄食方式吃餌，「吃完一口再吃第二口」，不會出現「硬把食物吞進肚子！」情況。而許多肉食性魚類，在吞食食物時，若食物體積較大，也會分次吞入，每口食物的體積大小都以嘴巴可吞入為主，也絕對不會出現無法吞食情況。以龍魚為例，雖然龍魚嘴巴張大幅度相當大，當餌食較大，也會先咬斷、撕裂後，讓餌食體積變小後再吞食。
Goldfish, Koi, Carp always snatch food, compete food when feeding, They always eat lot of feed in full mouth, If the feed particles is large, they are still eat it! eat it! Small size fish must to eat bait by pecking, because the mouth is very small, Many carnivorous fish will graded ingestion when the food size is large.
另一個重要觀察重點就是餌料的位置性，簡單地說，就是「浮水」與「沉底」。觀察溪流、湖泊中的魚隻覓食，幾乎都在溪底、河床、石頭縫隙中找尋食物，鮮少會接近水面覓食，這種習性，一來可避開自己成為其它強者的「食物」外，二來，藻類、浮流生物、小蝦、小魚...等，多半分佈在中、下層區域，自然地，魚隻當然不會接近水面覓食找食物。以目前人工飼料種類來看，大多為浮水性飼料，沉水性飼料種類較少。就飼料的沉水性，除與製作方式有關外，飼料含水分、原料重量...等，都是決定該飼料為浮水性與沉底式的關鍵技術。以世界知名魚飼料公司《日本 高固力，高夠力，Hikari》為例，在多款金魚飼料中，為何大多為沉底式飼料，而非是浮水性飼料呢？
Another important is position of the bait - "floating" or "sink", Fish search food always at bottom, riverbed, rock crevice, they will be close to water-surface to feed. this is very danger to them, it will avoid to become "food" for another strong fish, Most of algae, microorganisms, shrimp, small fish distribute in lower region, fish will search food in lower region. Most of artificial diet is floating feed, there are many important key about production methods, feed moisture content, material raw weight...etc, Why most of Hikari goldfish feed is sink?
以人工飼料大小來看，大多可分為：小、中、大三種尺寸，在一般魚友的餵養觀念中，小顆粒飼料適合小尺寸魚，大顆粒飼料，則針對大型魚隻餵養。我們進行「魚吃餌方式」測試實驗，透過投放較大尺寸飼料，觀察魚隻吃餌方式，是否會受到尺寸大小影響，改變吃餌料方式，甚至拒吃情況。
We perform an experiment to test feed particles size and fish eat the bait, we will observe the relevance of fish can not or refuse to eat large size feed, The experiment test to use "mini #1-Multi efficacy in one" to feeding.
（一）、孔雀魚吃餌 Guppy bait food
嘴型很迷你的孔雀魚，當然無法一口將較大尺寸的飼料吞下，在多次小口啄食進食吃餌下，最後還是將大顆粒飼料全部吃光。
Guppy mouth is very small, they can not eat large size feed, Guppy eat all feed by pecking way.
（二）、金魚吃餌 Goldfish bait food
大多魚友選用的浮水性飼料餵食，魚隻吃餌料的區域範圍當然會接近水面。改以採用沉底性的《mini #1多效合一 好料》進行餵食測試，觀察發現，飼料在完全沉底前，就被魚隻「攔截」，而掉落在旁的飼料，雖然魚隻想先吃，但仍有飼料在嘴巴中，並不斷地咬嚼，還是放棄繼續搶食，將嘴中的飼料吞肚後再吃另一顆飼料。雖然《mini #1多效合一 好料》顆粒尺寸較一般市售飼料大出許多，但不會造成魚隻無法吞食，利用較大尺寸及較軟硬度，讓魚隻必須咬嚼待餌料吞肚後，才能再吃其它飼料。
Feed fish with "mini #1-Multi efficacy in one", goldfish eat feed in water, the goldfish bite to eat.
（三）、底部覓食 Bottom bait food
平日飼養時，可觀察，再沒有餵食時，魚隻多半會在魚缸下層尋找食物，這種覓食方式，與生活在溪流、湖泊、海洋中的魚類相同，是魚類的天性。當魚隻吃到砂石，會立刻吐出，並不會吞入肚子。
Fish always search food in lower region. When fish will spit out immediately when eat gravel, they will not swallow to stomach. This is a natural instinct of fish bait food.
（四）、水面覓食 Water surface bait food
大多市售飼料都屬浮水性，當投放飼料後，飼料漂浮在水面，會吸引魚隻會立刻前來搶食，雖然都搶奪浮水性飼料，孔雀魚...等其它觀賞魚，吃餌方式較金魚、錦鯉魚...等魚類「斯文」，多屬於一口一口吃，而錦鯉魚、金魚...等魚類，多半會「一次掃光食物」的搶奪方式吃法。
Most of feed are floating feed, when feed floating on water-surface, fish will to snatch feed immediately, Guppy and goldfish, koi eat feed near water-surface, the guppy will a bite to eat, but goldfish and koi will snatch feed quickly.
魚友擔心飼料尺寸過大而無法吃餌，因此，選擇較小尺寸飼料，雖然飼料尺寸較小，卻增加每一口飼料數量。魚隻為了搶奪飼料，往往在吃進飼料後再沒有咬嚼下，又繼續搶奪其它飼養，坦若飼料硬度較高，膨脹軟化速度較慢、較慢，就容易「卡在」腸道中，這些不易軟化、消化飼料，若在腸道中時間過久，容易變質腐爛，腐爛後餌料就易滋生壞菌引起腸道發炎。
Many fish friends worry feed size too large, fish can not easy to eat it, so change smaller feed to feeding, but it will increase feeding amount of each mouthful, fish will snatch more food quickly, if the feed hardness is too hard, it is difficult to digest in fish intestinal, the hardness hard feed will decay in fish intestinal, it will increase the chance of intestinal inflammation.
進行較大尺寸飼料餵食測試，目的在觀察：「面對較大尺寸餌料時，魚隻的反應為何？吃還是放棄不吃？」，經過多組不同尺寸大小的魚隻，以相同的沉底性飼料餵食觀察下，魚隻吃餌進食方式出現變化，包括：
The purpose of experiment that we will observe the relationship of feed size and fish eating bait behavior, if feeding large size feed, fish will change the behavior of eating bait.
1.餵食較大扯吋、沉底式飼料，魚隻吃餌進食速度變得較慢。
2.在足以讓魚隻一口吃入大小飼料，魚隻吃到飼料後會產生咬嚼動作。
3.沒有出現「一次先掃光食物」，吞入嘴中飼料後再繼續吃其它飼料，形成一口一口吃餌進食方式。
1.To feeding larger size and sink feed, fish bait become slower.
2.Fish can eat larger size feed directly, they will crunch feed.
3.No snatch food, fish becomes eat a bait one by one.
飼料的大小並不會讓魚隻無法吃不下、吞不下或拒吃情況，魚隻反而會因餌料的大小，吃餌進食方式會隨之改變。
We find that feeding large size feed will not affect fish bait, but feeding large size feed will change fish eating bait behavior.
