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Can you see in the last photo how he even changes his skin texture? Crazy stuff.
You can tell their mood so clearly by colour and body language, mine go white when scared and raise their tentacles threateningly. When they are on the hunt they go almost transparent and smooooooth, look like invisible tornados diving at prey.
Hatched many cuttles from eggs found on shore of south coast (Eastbourne, mostly) - eggs travelled home in damp seaweed. Never worried about temperature - some lived with tropical seahorses @ 80F (+?) upstairs in semi-natural tank (with reverse-flow filtration and protein skimmer, caulerpa weed) - temperature probably more important as they grow? Others hatched outdoors with native weeds (while I was hunting replacement eggs on a hot August day!), kept some unheated in the garage with a protein skimmer (vital to reduce waste and clean ink out of water) for over a year.
Vital that they can feed early (I only had access to "river shrimp"), which needs to be small enough that they can be caught, killed and eaten without the cuttle being kicked off. Non-feeders die. Later dead food (thawed shrimp, fish) may be taken but felt that fish might be worse if the cuttles have rear-end damage from hitting the glass. They learn that YOU feed them! I thought brine shrimp too "fluffy", only used in emergency. At least 1 cuttle developed a taste for young seahorses . . .
Thank you mikeconstable. Six still happy and hunting, I moved them onto sandhopper shrimp off the beach today as have a ready supply and thought more likely what they would be eating, plus I can't get enough mysis now to keep up with them. Few took to the shrimp like pro's but a couple seemed terrified and jetted away. They are growing fast and did some little ink squirts this morning when I startled them, first time that's happened.
Can you remember how old they were when they took frozen food? One of mine ate some yesterday but once it reaches the bottom they ignore it. They are def recognising me now and a few swim up to the glass and change colour, go a rusty reddish brown which I am assuming is excitement as they know dinner is coming.
I have been raising Dwarf cuttles for awhile. Agitated water flow is actually good for them seeing they seem to develop better in their sacs and have a higher birth rate that way. After about a month they will need larger prey than Mysid. I use Grass or Ghost shrimp. Any questions on them?